Joe Tobias and Nat Seddon 131 Catharine Street, Cambridge CB1 3AP, UK joetobias22@hotmail.com Photo: Long-tailed Potoo

Itinerary

Notes on Sites

Yasuní

Details of access arrangements have not changed since provided by Patrick O'Donnell (search on internet). You still need to visit the fourth-floor of the Biology Department in the Universidad Católica, Quito, and speak to a secretary in an office marked "Yasuní Research Station". It is still US$30 dollars to stay at the station, although this includes very comfortable air-conditioned rooms (a real bonus in these humid climes), and food that is both excellent and unlimited.

It can be a bit of a pain crossing the Napo. The oil-field personnel tried to extract extra payment for letting us across, which we side-stepped. In the end we paid US$10 for a boat, although there are free boats and barges if you can wait (we did it for free on the way back). Prepare for quite a lot of waiting around and hassle with security at the oil-field. A recent problem involving Colombian guerrillas has raised surveillance.

It takes considerable extra time and resources to get to Tiputini Research Station, further down the Rio Tiputini (and it can cost well over US$100 a night to stay, unless you are researchers). The latter station is doubtless situated in finer habitat and enjoys lower hunting pressure than Yasuni Research Station (which is being hunted - apart from the core area - by fairly high populations of Indigenous folk living along the main road). Yasuní still makes for a good introduction to the Amazonian avifauna.

At Yasuní Research Station various trails provide immediate access to the forest. The Laguna trail is very good, providing access to lakeside and seasonally flooded habitats (very muddy after rain) and also to terra firma where it meets with other trails such as Kinkajou, Napo and Cosanga. On the other side of the lodge, the Mirador and Peru trails were also good and passed through reasonable quality terra firma, mostly along ridgetops. By walking to end of the Mirador trail it was possible to cross over the main road, walk a little to the left, then cut right for 150 m on a short trail to the canopy platform (this trail begins at the crest of an embankment somewhere near the Km 9 marker on the main road). This platform was excellent, especially early and late in the day. At the beginning of the Mirador trail there is a metal lookout over the river: a fine place to relax in mid-afternoon.

Guacamayos ridge

On leaving Yasuní, we booked a taxi (US$15) to take us to the cross-roads town (can't remember the name) from where we could get a bus to Coca. The bus to Coca from the there took about one hour and then we caught a bus to Tena (c.5 dollars each), getting off at the "Ye" (junction) where the road forks to Quito. From this junction we hitch-hiked (asking for "la virgen de los Guacamayos") in a pick-up which dropped us off 45 mins later at 7 pm in the fog by the virgin. We clambered up to the abode under the telecommunications mast, asked for permission to camp in the forest, circumnavigated the rabid dogs and set up a tent about 50 m down the old Inca trail on the only flat bit of ground for miles. We birded down this trail 4 km until the oli-pipeline, and then had to run back in torrential rain.

Cabañas San Isidro (CSI)
Several months later, after trips to Peru, Bolivia and Chile, we broke our journey homeward by staying for a few days near Cabañas San Isidro. One two separate mornings we paid for a lift from Don Carlos at San Isidro, to the Guacamayos trail, reaching this site before dawn. The journey there cost US$7, and we hitched and walked the way back both times. We were blessed with two rain-free mornings on the ridge.

Highlights

c.250 species recorded in our week at Yasuní, another 100 or so added upslope.

Highlights were as follows: (at Yasuní) Long-tailed Potoo on a nest, a pair of foraging and mating Fiery Topaz, White-chinned Swift (from the canopy platform on one evening), Brown-backed Antwren, Lunulated Antbird, Black-necked Red-Cotinga, Orange-eyed Flatbill (perhaps a new record for the immediate area). Also Monk Saki Monkey and Golden-mantled Tamarin.

(and at San Isidro, Guacamayos ridge): Emerald-bellied Puffleg, White-bellied Antpitta, Moustached Antpitta, Bicoloured Antvireo, Barred Antthrush, White-rimmed Brush-finch, Brown-billed Scythebill, Dusky Piha, Olivaceous Piha, Golden-collared Honeycreeper.

Other interesting records from a biogeographical standpoint were: Mottled Owl at YRS (apparently rare in the eastern lowlands), Pale-tailed Barbthroat on Guacamayos ridge (2150 m).

Species lists

Nomenclature and sequence for mammals follows Emmons and Feer (1997), and for birds roughly follows Ridgely and Greenfield (2001).

Key:

[.]      = a note or a provisional record
(T)       = tape recorded
YRS     = Yasuni Research Station

Mammals

WESTERN WOOLLY OPOSSUM  Caluromys lanatus
A few seen coming to Cecropia fruit along the main road at YRS after dark

GOLDEN-MANTLE TAMARIN  Saguinus fuscicollis
3-4 small troops (5-8 individuals) of this restricted-range primate seen at YRS, mostly along the Laguna trail; typical high-pitched whistles attract attention (T)

DUSKY TITI MONKEY Callicebus (moloch) cupreus
Two troops encountered at YRS, one on the Laguna trail, another on the Mirador trail; loud vocalisations (T)

COMMON SQUIRREL MONKEY  Saimiri sciureus
4-5 large troops seen at YRS, one regularly in the várzea along the Laguna trail, another often passing opposite the river lookout

WHITE-FACED CAPUCHIN MONKEY  Cebus apella
Small numbers accompanying a large troop of Squirrel Monkeys on the Laguna trail, YRS

MONK SAKI MONKEY  Pithecia monachus
Pairs or small groups of this fantastic animal seen on c.5 occasions at YRS, particularly in terra firma along Napo, Kinkajou and Laguna trails; quiet sharp notes given in alarm (T)

WHITE-BELLIED SPIDER MONKEY  Ateles belzebuth belzebuth
At YRS one group seen along the Peru trail, and one or two groups heard elsewhere (T)

COMMON WOOLLY MONKEY  Lagothrix lagothricha
One adult male, apparently solitary, was seen well in canopies along the Mirador trail, YRS

KINKAJOU  Potos flavus
3-4 seen at night along the main road, YRS

SOUTHERN AMAZONIAN RED SQUIRREL  Sciurus spadiceus
2-3 individuals seen at YRS

GREEN ACOUCHY Myoprocta pratti
2-3 seen running across trails or through undergrowth, YRS

BRAZILIAN RABBIT  Sylvilagus brasiliensis
Fairly common at night around the station grounds

Birds

Grey Tinamou  Tinamus tao
One flushed in terra firma on Laguna trail, YRS

Great Tinamou  Tinamus major
Heard daily at YRS; three flushed, one seen well on ground

White-throated Tinamou  Tinamus guttatus
Two heard in swampy areas near beginning of Laguna trail, YRS

Cinereous Tinamou  Crypturellus cinereus
Heard frequently at YRS; one seen on ground (T)

Little Tinamou  Crypturellus soui
A single bird on two separate days at YRS (T)

Undulated Tinamou  Crypturellus undulatus
Commonly heard and several seen in floodplain forest along the Laguna trail, YRS

Variegated Tinamou  Crypturellus variegatus
Two heard at YRS

Capped Heron  Pilherodius pileatus  
Two seen repeatedly from the river lookout at YRS

Cattle Egret  Bubulcus ibis
A single bird seen along the Rio Tiputini

Greater Yellow-headed Vulture  Cathartes melambrotus
Fairly common at YRS

Black Vulture  Coragyps atratus      
Common in lowlands

Osprey  Pandion haliaetus
One flew over the forest at CSI on one morning

Swallow-tailed Kite  Elanoides forficatus 
c.4 seen along the main road at YRS

Plumbeous Kite  Ictinia plumbea
c.5 seen along the main road at YRS

Plain-breasted Hawk  Accipiter ventralis
Several seen at CSI

Bicoloured Hawk  Accipiter bicolor
One adult and one young bird seen at CSI

Double-toothed Kite  Harpagus bidentatus
Two individuals seen circling over forest, YRS

Grey-headed Kite  Leptodon cayanensis
A single bird seen flying over the river at YRS

Roadside Hawk  Buteo magnirostris
c.5 seen along the main road at YRS

Black Hawk-eagle  Spizaetus tyrannus
A single bird calling while circling over forest at YRS

red-throated caracara Ibycter americanus
c.20 seen or heard on all trails at YRS (T)

Black Caracara  Daptrius ater
c.10 seen or heard, mostly along the river, YRS

Barred Forest-falcon Micrastur ruficollis
One heard and another seen attending an antswarm along the Laguna trail, YRS

Collared Forest-falcon  Micrastur semitorquatus
2-3 heard at CSI and one adult seen well in response to tape-playback (T)

Laughing Falcon  Herpetotheres cachinnans  
Never seen, but one pair heard at dusk along the Laguna trail, YRS

Bat Falcon  Falco rufigularis
One seen from the canopy platform, YRS

American Kestrel  Falco sparverius
Several sightings below Guacamayos ridge and near Cosanga

Speckled Chachalaca  Ortalis guttata
Four seen or heard along the Laguna trail, YRS

Andean Guan  Penelope montagnii
Several heard and two seen on the Guacamayos ridge in March 2003 (T)

Spix's Guan  Penelope jacquacu
c.10 flushed, or heard calling, mostly around the Laguna trail, YRS

Sickle-winged Guan  Chamaepetes goudotii
Two birds flushed from a stream on the Guacamayos ridge, others around CSI where it is much more conspicuous than Wattled Guan

Blue-throated Piping-guan  Pipile cumanensis
Fairly common at YRS. Several seen daily, many coming to fruiting Cecropias along the main road

Wattled Guan  Aburria aburri
Several individuals heard most nights around CSI, calling right up to dawn, but always too far from the road to see

Salvin's Curassow Mitu salvini
Recorded at YRS. One watched going to roost beside the first oxbow on the Laguna trail, another heard singing continuously opposite the river lookout in the middle of the day. This latter was invisible when calling but eventually flew over the river

Marbled Wood-quail  Odontophorus gujanensis
Heard on 3-4 occasions along the Laguna trail, YRS

Chestnut-headed Crake  Anurolimnas castaneiceps
Two pairs were heard duetting at YRS along the damper parts of the Laguna trail on several occasions (T)

Grey-breasted Crake Laterallus exilis
One heard in a broad patch of damp grass along the main road at YRS

Sunbittern Eurypyga helias
One along the Rio Tiputini, near YRS

Southern Lapwing  Vanellus chilensis  
Several at the Río Napo crossing

Spotted Sandpiper Actitis macularia    
c.20 along the Rio Tiputini, near YRS

Large-billed Tern Phaetusa simplex     
Two on the Rio Napo

Pale-vented Pigeon  Columba cayennensis
Fairly common (c.5 heard daily), even away from the Rio Tiputini and associated oxbows (T)

Plumbeous Pigeon  Columba plumbea  
Commonly heard at YRS (T)

Ruddy Pigeon  Columba subvinacea
One heard singing at c.1,900 m on the Pipeline trail, Guacamayos ridge

Band-tailed Pigeon  Columba fasciata
Common at Guacamayos ridge: c.30 seen

Sapphire Quail-dove  Geotrygon sapphirina
Seen on two occasions by the Laguna trail, YRS

White-throated Quail-dove  Geotrygon frenata
Commonly heard at CSI and Guacamayos ridge; two seen at the latter (T)

Grey-fronted Dove  Leptotila rufaxilla
Seen once and heard regularly around the lagunas and along the Rio Tiputini, YRS

Blue-and-yellow Macaw  Ara ararauna      
c.8 seen at YRS, mostly from the canopy platform

Scarlet Macaw  Ara macao      
c.12 seen in total at YRS, many from the canopy platform

Chestnut-fronted Macaw  Ara severa 
c. 5 seen or heard at YRS

Cobalt-winged Parakeet  Brotogeris cyanoptera
Large numbers seen or heard at YRS

Black-headed Parrot Pionites melanocephala
Fairly common at YRS, at least by voice; c.40 recorded in total (T)

Orange-cheeked Parrot  Pionopsitta barrabandi
Also common at YRS, especially by voice; c.50 recorded in total (T)

Blue-headed Parrot  Pionus menstruus    
Seen or heard on c.10 occasions at YRS (T)

White-capped Parrot  Pionus seniloides
Small groups seen and heard flying around Guacamayos ridge (T)

Orange-winged Amazon Amazona amazonica
One flock of c.5 was seen flying over the Napo and giving distinctive shrill call notes

Mealy Amazon Amazona farinosa
c.15 recorded at YRS, mostly by voice (T)

Scaly-naped Amazon  Amazona mercenaria
c.20 seen around the Guacamayos ridge

Dark-billed Cuckoo  Coccyzus melacoryphus
One seen in riverside trees above the lookout at YRS

Squirrel Cuckoo  Piaya cayana
c.3 seen at YRS, one seen at CSI, c.5 others heard (T)

Smooth-billed Ani  Crotophaga ani     
A few seen or heard along the main road to YRS

Hoatzin  Opisthocomus hoazin
c.5 seen at the lagunas on Laguna trail, YRS

Tropical Screech-owl  Otus choliba
One bird seen and heard around the station buildings occasionally (T)

Rufescent Screech-owl  Otus ingens
One heard calling before dawn on Guacamayos ridge, near the crest

Tawny-bellied Screech-owl  Otus watsonii
Only heard on two occasions at YRS

Ferruginous Pygmy-owl Glaucidium brasilianum
One individual singing every night and most daytimes around the river lookout at YRS, where it was seen on several occasions; 2-3 others heard on night walks (T)

Crested Owl  Lophostrix cristata
c.3 heard at YRS, mostly distantly, on night-walks (T)

[Black-banded Owl  Strix huhula]
The resident pair of unidentified owls was seen at San Isidro (c.2,000 m). Their identity remains mysterious: they show characteristics intermediate between S. huhula and S. nigrolineata, and are out of the altitudinal range of both these forms.

Mottled Owl  Strix virgata
Heard three times at YRS, with one pair attracted using playback and seen very well along the main road (T)

Rufous-banded Owl  Strix albitarsus
Many individuals heard calling each night at CSI, but not seen despite several attempts (T)

Oilbird  Steatornis caripensis
One seen flying over the main road at CSI at dawn on one morning

Great Potoo  Nyctibius grandis
One seen roosting in the daytime along the Mirador trail (this bird snapped its bill a couple of times at a male Golden-collared Toucanet that mobbed it!), another two were seen at night and several others heard (T)

Long-tailed Potoo  Nyctibius aethereus
Never heard at night, but one was found and photographed on a nest while night-walking (around the 8 km marker post on the main road)

Common Potoo  Nyctibius griseus
One active nest was found, another three individuals seen at night and many more heard; when a full moon rose, vocalisations could be heard in all directions (T)

Pauraque  Nyctidromus albicollis   
c.20 seen or heard, mostly around the station and along main roads (T)

White-collared Swift  Streptoprocne zonaris
Only two (including one juvenile) seen flying over the canopy tower on one evening at YRS

Chestnut-collared Swift  Streptoprocne rutilus
Large numbers seen near Guacamayos ridge and San Isidro

White-chinned Swift  Cypseloides cryptus
5-6 individuals repeatedly cruised low over the canopy platform at YRS half-an-hour before sunset in perfect low light on one evening; they were travelling west towards the foothills (and the sunset, and me, eventually coming overhead) with two White-collared Swifts for comparison (including a juvenile). They seemed bulky, around three-quarters the size of the accompanying Streptoprocne, but differed in being more compact, square-tailed, all dark and with a pale frontlet that looked diffuse rather than localised into spots. They were considerably more bulky than Chestnut-collared Swift and Spot-fronted Swift. One individual had a pale band on the underparts across the legs, similar to the illustration of Spot-fronted Swift in Ridgely and Greenfield. It was otherwise identical to the other White-chinned Swifts. Most specimens of both species lack this band altogether, and it is not thought to be a useful feature in terms of distinguishing between them (perhaps it is merely age-related).

Short-tailed Swift  Chaetura brachyura  
c.5 were seen along the main road at YRS

Grey-rumped Swift  Chaetura cinereiventris
Common over the river and along roads at YRS (T)

Pale-rumped Swift  Chaetura egregia
At least two were seen well accompanying other swifts above the river at YRS

Lesser Swallow-tailed Swift  Panyptila cayennensis
Two seen flying over the river from the lookout at YRS

Neotropical Palm-swift  Tachornis squamata
c.4 seen flying over the roads

Pale-tailed Barbthroat  Threnetes niger
One male in song in the primate grid, and another seen well on the pipeline trail at Guacamayos ridge (at 2050 m this was a very high altitude for the species, well above the usual maximum of 1100 m mentioned by Ridgely and Greenfield) (T)

Tawny-bellied Hermit  Phaethornis syrmatophorus
Fairly common at CSI and guacamayos ridge

White-bearded Hermit  Phaethornis hispidus
Two seen along the Laguna trail in várzea at YRS

Straight-billed Hermit  Phaethornis bourcieri
One calling loudly from a song-post in the primate grid (terra firma); photographed

Green-fronted Lancebill  Doryfera ludovicae
One seen behind the virgin at Guacamayos ridge

Grey-breasted Sabrewing  Campylopterus largipennis
One individual seen in the primate grid at YRS

Fork-tailed Woodnymph  Thalurania furcata
Fairly common at YRS

Speckled Hummingbird  Adelomyia melanogenys
Common at CSI and Guacamayos ridge (T)

Fawn-breasted Brilliant  Heliodoxa rubinoides
Several visiting the feeders at Cabañas San Isidro

Gould's Jewelfront  Heliodoxa aurescens
One male seen well perched up along the main road at YRS

Fiery Topaz  Topaza pyra
One male and one female regularly came to feed in a large flowering tree at YRS. Despite information given in Ridgely and Greenfield, these spectacular birds seemed to spend much of the time in this tree foraging on nectar, generally about 20 metres up, mating, calling and vigorously defending their patch against other hummers (T)

Bronzy Inca  Coeligena coeligena
A few visiting feeders at Cabañas San Isidro

Collared Inca  Coeligena torquata
Several at feeders at Cabañas San Isidro, and in forest on the Guacamayos ridge

chestnut-breasted coronet  Boissonneaua matthewsi
Common around the feeders at Cabañas San Isidro (T)

Emerald-bellied Puffleg  Eriocnemis alinae
One individual of this scarce and distinctive hummingbird was seen feeding at flowering epiphytes near the crest of the Guacamayos ridge, March 2003

Greenish Puffleg  Eriocnemis aureliae
One individual seen perched in the subcanopy at CSI

Long-tailed Sylph  Aglaiocercus kingi
Very common at CSI and Guacamayos ridge

Black-eared Fairy  Heliothryx aurita
One seen visiting the same flowering tree as Topaza pyra at YRS

Crested Quetzal  Pharomachrus antiasanus
One seen and two more heard at CSI

Golden-headed Quetzal  Pharomachrus auriceps
Regularly seen and common by voice at CSI (T)

Black-tailed Trogon  Trogon melanurus
c.8 heard at YRS (T) 

Amazonian White-tailed Trogon  Trogon viridis
c.15 heard at YRS, three seen (T)

Amazonian Violaceous Trogon  Trogon violaceus
Two individuals heard at YRS, one seen

Collared Trogon  Trogon collaris
2-3 heard at YRS (T)

Masked Trogon  Trogon personatus
A few seen at CSI and Guacamayos ridge

RINGED KINGFISHER  Ceryle torquata
Three along the main river at YRS

Green Kingfisher  Chloroceryle americana   
Three along the main river at YRS

Green-and-rufous Kingfisher  Chloroceryle inda
One male along the main river at YRS

Rufous Motmot Baryphthengus martii
Four seen at YRS, others heard, mostly in terra firma (T)

Highland Motmot  Momotus aequitorialis
Regularly heard at CSI, and c.7 seen (T)

White-eared Jacamar  Galbalcyrhynchus leucotis
Two heard regularly (and seen once) around the oxbows on the Laguna trail, YRS

Yellow-billed Jacamar  Galbula albirostris
One seen at a treefall along the Mirador trail at YRS, and 1-2 others heard. A jacamar heard along the Laguna trail sounded more like White-chinned Jacamar Galbula tombacea, but was unfortunately not seen (status of latter species south of Río Napo is uncertain) (T)

Black-fronted Nunbird  Monasa nigrifrons  
c.30 pairs/groups seen or heard at YRS (T)

White-fronted Nunbird  Monasa morphoeus
c.5 pairs/groups seen or heard at YRS (T)

Yellow-billed Nunbird  Monasa flavirostris
Four individuals seen at YRS, mainly along main road

Swallow-winged Puffbird  Chelidoptera tenebrosa  
c.10 seen at YRS, mainly along river

Gilded Barbet  Capito auratus
Seemed very common at YRS: c.5 seen, c.50 heard (T)

Lemon-throated Barbet  Eubucco richardsoni
Also common at YRS: c.3 seen, c.8 heard (T)

Red-headed Barbet  Eubucco bourcierii
A few seen on Guacamayos ridge

Emerald Toucanet  Aulacorhynchus prasinus
Fairly common and vocal at CSI and Guacamayos ridge

Golden-collared Toucanet  Selenidera reinwardtii
Common and vocal at YRS: c. 15 heard, c.6 seen, including one male mobbing a Great Potoo in daytime: quite a sight (T)

Many-banded Araçari  Pteroglossus pluricinctus
c.10 seen at YRS, mostly from the canopy platform

Ivory-billed Araçari  Pteroglossus azara
This species seemed fairly common at YRS, with c.30 individuals seen, many roving in small noisy groups near the canopy platform (T)

Lettered Araçari  Pteroglossus inscriptus  
c.4 seen at YRS

Black-billed Mountain-toucan  Andigena nigrirostris
At least one individual heard calling on Guacamayos ridge

Channel-billed Toucan  Ramphastos vitellinus
c.5 heard and 1-2 seen at YRS (T)

White-throated Toucan  Ramphastos tucanus
c.30 heard or seen at YRS (T)

Spot-breasted Woodpecker  Chrysoptilus punctigula
Two seen along river margins at YRS, including from the lookout

Crimson-mantled Woodpecker  Piculus rivolii
Three seen on Guacamayos ridge

Chestnut Woodpecker  Celeus elegans
c.3 seen at YRS

Scale-breasted Woodpecker  Celeus grammicus
None seen, but two heard at YRS

Cream-coloured Woodpecker  Celeus flavus
Seen on three occasions at YRS, around the lakes along the Laguna trail

Lineated Woodpecker  Dryocopus lineatus
Two seen at YRS

Yellow-tufted Woodpecker  Melanerpes cruentatus 
Fairly common at YRS: c.15 seen or heard

Yellow-vented Woodpecker  Veniliornis dignus
About five individuals seen, mostly with mixed-species flocks, at CSI

Crimson-crested Woodpecker  Campephilus melanoleucos
c.8 seen or heard at YRS (T)

Powerful Woodpecker  Campephilus pollens
Two pairs seen well on Guacamayos ridge, and others heard drumming at CSI (T)

Azara's Spinetail  Synallaxis azarae
Common in grassy or shrubby habitats at CSI (T)

Rufous Spinetail  Synallaxis unirufa
A few heard and one seen in bamboo at Yanayaca (T)

Speckled Spinetail  Cranioleuca gutturata
One seen in lower growth at YRS

Streaked Tuftedcheek  Pseudocolaptes boissoneautii
A few seen with flocks at CSI and Guacamayos ridge

Pearled Treerunner  Margarornis squamiger
Common at CSI and Guacamayos ridge

SpottedBarbtail  Premnoplex brunnescens
Two seen and many heard at CSI and Guacamayos ridge

Rusty-winged Barbtail  Premnornis guttuligera
One seen in lower growth near the top of the pipeline trail, Guacamayos ridge

Montane  Foliage-gleaner  Anabacerthia striaticollis
A few seen with flocks at Guacamayos ridge

Chestnut-winged Hookbill  Acistrops strigilatus
One seen in a mixed species flock along the road at YRS

Olive-backed Foliage-gleaner  Automolus infuscatus
c.5 heard (mostly at dawn or - especially - dusk) and 1-2 seen at YRS (T)

Buff-throated Foliage-gleaner  Automolus ochrolaemus
One in the primate grid at YRS, seen and heard (T)

Chestnut-crowned Foliage-gleaner  Automolus rufopileatus
2-3 heard singing from the boat in tangled riverside regrowth, a little way downstream of YRS on the Río Tiputini

Streak-capped Treehunter  Thripadectes virgaticeps
One seen and others heard at CSI

Plain Xenops  Xenops minutus
One in a mixed flock at YRS

Black-tailed Leaftosser  Sclerurus caudacutus
Three individuals heard singing at YRS, but none seen (T)

Tyrannine Woodcreeper  Dendrocincla tyrannina
One seen well on Guacamayos ridge, another heard singing at CSI (T)

Plain-brown Woodcreeper  Dendrocincla fuliginosa
c.4 seen or heard (T)

Wedge-billed Woodcreeper  Glyphorhynchus spirurus
Common at YRS: c.20 seen

Long-billed Woodcreeper  Nasica longirostris
Heard and seen regularly in riverine forest and around the lagunas at YRS (T)

Cinnamon-throated Woodcreeper  Dendrexetastes rufigula
c.4 heard at YRS, mostly in várzea

Strong-billed Woodcreeper  Xiphorhynchus promeropirhynchus
A pair seen well in mid-strata at CSI

Amazonian Barred Woodcreeper  Dendrocolaptes certhia
c.3 heard in high canopy at YRS

Black-banded Woodcreeper  Dendrocolaptes picumnus
One seen well with an understorey flock along the Laguna trail at YRS, in terra firma

Straight-billed Woodcreeper  Xiphorhynchus picus
c.3 heard around the lagunas at YRS

Tschudi's Woodcreeper  Xiphorhynchus cunchotambo
At least three birds were seen and heard singing at YRS (T)

Buff-throated Woodcreeper  Xiphorhynchus guttatus
Commonly heard and quite frequently seen at YRS (T)

Olive-backed Woodcreeper  Xiphorhynchus triangularis
Several seen with mixed flocks at CSI and Guacamayos ridge

Montane Woodcreeper  Lepidocolaptes lacrymiger
Common at CSI and Guacamayos ridge

Lineated Woodcreeper  Lepidocolaptes albolineatus
2-3 seen with canopy flocks at YRS

Brown-billed Scythebill  Campylorhamphus pusillus
Five seen with three separate mid-or lower-strata flocks on Guacamayos ridge; they never called and spent most of the time neck deep in epiphytes. No luck with pucherani

Fasciated Antshrike  Cymbilaimus lineatus
c.6 heard and 2-3 seen at YRS, primarily in terra firma

Great Antshrike  Taraba major
2-3 heard downstream of YRS during the boat-trip along the Río Tiputini

Plain-winged Antshrike  Thamnophilus schistaceus
Heard on two occasions at YRS: a faster song than the following species, although a bit tricky to tell sometimes (T)

Mouse-coloured Antshrike Thamnophilus amazonicus     
c.6 heard at YRS with a couple of pairs played in to make sure. It was usually found in mixed flocks along on ridgetops in terra firma (T)

Spot-winged Antshrike  Pygiptila stellaris
c.5 heard at YRS, one of which was seen (T)

Bicoloured Antvireo  Dysithamnus occidentalis
One female seen near a nest at CSI (T)

Dusky-throated Antshrike  Thamnomanes ardesiacus
c.6 encountered with understorey flocks at YRS (T)

Cinereous Antshrike  Thamnomanes caesius
Like the last species, a noisy constituent of understorey flocks at YRS: about 10 were seen or heard in all (T)

Pygmy Antwren  Myrmotherula brachyura
Common in canopy flocks at YRS: c.10 heard or seen. Some of the audial records might refer to Short-billed Antwren Myrmotherula obscura, but that species remained obscure (T)

Amazonian Streaked-antwren  Myrmotherula multostriata
At least one male heard singing around the lakes on the Laguna trail at YRS (T)

Brown-backed Antwren  Myrmotherula fjeldsaai
Only one seen at YRS, a silent male watched as it preened while an understorey flock stayed in one general area of the Kinkajou trail for 20 minutes

Rufous-tailed Antwren  Myrmotherula erythrura
One accompanying an understorey flock along the Laguna trail, YRS (T)

White-flanked Antwren  Myrmotherula axillaris
Common at YRS: c.20 were seen, mostly with understorey flocks (T)

Long-winged Antwren  Myrmotherula longipennis
One male was seen with an understorey flock at YRS; the song was also heard once (T)

Grey Antwren  Myrmotherula menetriesii
c.5 seen or heard at YRS, all with understorey flocks (T)

Dugand's Antwren  Herpsilochmus dugandi
Common and apparently accompanying almost every canopy flock at YRS: c.20 were heard and 2-3 were eventually seen (T)

Chestnut-shouldered Antwren  Terenura humeralis
At YRS one male was seen accompanying a canopy flock and the voice was noticed on c.3 occasions (T)

Grey Antbird  Cercomacra cinerascens
Common in vine-tangles at YRS: c.15 were heard in all (T)

Black Antbird  Cercomacra serva
c.3 were heard at YRS, all in tangled roadside habitat

White-backed Fire-eye  Pyriglena leuconota  
A pair was heard and seen on Guacamayos ridge (T)

Black-faced Antbird  Myrmoborus myotherinus
Fairly common at YRS: c.10 were seen or heard in tangled undergrowth of both várzea and terra firma (T)

Warbling Antbird  Hypocnemis cantator
Fairly common at YRS: c.10 seen or heard in both várzea and terra firma (T)

Spot-backed Antbird  Hylophylax naevius
Two males heard at YRS, one seen well after playback on Napo trail (T)

Scale-backed Antbird  Hylophylax poecilinotus
c.3 heard at YRS, one of these played in to close range in the primate grid (T)

Banded Antbird  Dichrozona cincta
c.5 heard at YRS, with one of these spectacular little birds seen well after playback on Napo trail (T)

White-shouldered Antbird  Myrmeciza melanoceps
2-3 pairs at YRS, along the wetter portion of the Laguna trail, were seen occasionally and heard repeatedly (T)

Sooty Antbird  Myrmeciza fortis
c.3 heard and one seen at YRS (T)

White-plumed Antbird  Pithys albifrons
c.6 individuals at one swarm crossing the Laguna trail at the edge of terra firma at YRS (T)

Bicoloured Antbird  Gymnopithys leucaspis
One was glimpsed briefly at the same swarm on the Laguna trail, YRS, and another swarm was heard some way off the Peru trail, announced by the distinctive song of this species (T)

Lunulated Antbird  Gymnopithys lunulata
One silent female was in constant attendance of the swarm on the Laguna trail at YRS

Hairy-crested Antbird  Rhegmatorhina melanosticta
One individual was at the same antswarm on the Laguna trail, YRS, presumably a male as it sang occasionally (T)

Rufous-capped Antthrush  Formicarius colma
The song was never heard at YRS, but one bird was seen on Napo trail giving alarm calls (T)

Black-faced Antthrush  Formicarius analis
c.10 were heard singing at YRS, only one of which was seen (T)

Noble Antthrush  Chamaeza nobilis
The lovely song of this species was heard once close to the main road near the canopy tower

Barred Antthrush  Chamaeza mollissima
Several (c.10) heard vocalising at CSI and Guacamayos ridge in March 2003; one pair seen at the latter in response to playback (T)

moustached antpitta  Grallaria alleni
Several (c.5) heard vocalizing along upper portion of the pipeline trail on Guacamayos ridge, two of which came close and one of which was glimpsed (T)

Chestnut-crowned Antpitta  Grallaria ruficapilla
Occasionally heard at CSI, but not seen (T)

White-bellied Antpitta  Grallaria hypoleuca
One seen along the pipeline trail on Guacamayos ridge, several others heard here and at CSI (T)

Thrush-like Antpitta Myrmothera campanisona
None were seen at YRS but c.10 were heard; Ochre-striped Antpitta Grallaria dignissima was never heard at this site despite careful listening and occasional speculative playback (T)

Slate-crowned Antpitta  Grallaricula nana
A pair seen in response to playback at CSI, and one other individual heard nearby (T)

Rusty-belted Tapaculo  Liosceles thoracicus
Not seen but c.5 were heard (T)

Ash-coloured Tapaculo  Myornis senilis
One individual heard repeatedly in bamboo at CSI, but not seen despite a close approach (T)

Blackish Tapaculo  Scytalopus latrans
Commonly heard at CSI and Guacamayos ridge, with two seen after playback (T)

Equatorial Rufous-vented Tapaculo  Scytalopus micropterus
One seen after playback at Guacamayos ridge; commonly heard here and at CSI (T)

Spillman's Tapaculo  Scytalopus spillmanni
One seen after playback at Guacamayos ridge; commonly heard here (T)

Ocellated Tapaculo  Acropternis orthonyx
One heard at CSI (apparently rare here)  and one heard at Guacamayos ridge

Golden-faced Tyrannulet  Zimmerius chrysops
One seen and heard with a canopy flock at lower end of Guacamayos ridge in September 2002, another two seen there in March 2003 (T)

White-lored Tyrannulet  Ornithion inerme
c.3 heard with canopy flocks at YRS (T)

Yellow-crowned Tyrannulet  Tyrannulus elatus
c.10 heard at YRS, often around the lagunas

Grey Elaenia  Myiopagis caniceps
One male was seen from the canopy platform

White-tailed Tyrannulet  Mecocerculus poecilocercus
Common and vocal with canopy flocks at CSI, usually staying high in trees

Sulphur-bellied Tyrannulet  Mecocerculus minor
Fairly common and vocal with mixed-flocks at CSI, regularly coming out low into shrubby pastures

Streak-necked Flycatcher  Mionectes striaticollis
c. 5 seen at Guacamayos ridge and several others at CSI

Ochre-bellied Flycatcher  Mionectes oleagineus
c.3 heard and 1-2 seen at YRS (T)

Slaty-capped Flycatcher  Leptopogon superciliaris
Fairly common at CSI (T) 

Sepia-capped Flycatcher  Leptopogon amaurocephalus
Only seen seen and heard at YRS (T)

Rufous-breasted Flycatcher  Leptopogon rufipectus
Several seen accompanying subcanopy flocks at CSI and Guacamayos ridge; often picked up by their squeaky call (T)

Variegated Bristle-tyrant  Pogonotriccus poecilotis
One bristle-tyrant with a mid-strata flock at Guacamayos ridge proved to be this species rather than the expected ophthalmicus; c.4 individuals were also seen at CSI

Marbled Bristle-tyrant  Pogonotriccus ophthalmicus
1-2 were seen with mixed flocks at CSI

Bronze-olive Pygmy-tyrant  Pseudotriccus pelzelni
A few heard in undergrowth at CSI, and two seen well

Rufous-headed Pygmy-tyrant  Pseudotriccus ruficeps
2-3 seen in undergrowth on Guacamayos ridge

Double-banded Pygmy-tyrant  Lophotriccus vitiosus
Common at YRS: c.20 heard and a couple seen (T)

White-eyed Tody-tyrant  Hemitriccus zosterops
1-2 heard at YRS; tried to play one back in but couldn't see it (T)

Rufous-crowned Tody-flycatcher  Poecilotriccus ruficeps
Fairly common in lower growth at CSI and Guacamayos ridge

[Yellow-browed Tody-flycatcher  Todirostrum chrysocrotophum]
A longish series of slowly-delivered weak tsip notes from the canopy heard on c.3 occasions at YRS was probably made by this species

Olivaceous Flatbill  Rhynchocyclus olivaceus
Two were seen at YRS accompanying an understorey flock on the Peru trail; one of these occasionally gave the song, an unobtrusive series of wheezy notes (T)

Fulvous-breasted Flatbill  Rhynchocyclus fulvipectus
Two seen with mid-strata flocks at Guacamayos ridge

Orange-eyed Flycatcher  Tolmomyias traylori
A noisy group of 4 (seemingly a family party, not associated with a mixed species flock) were seen well on two occasions in seasonally flooded riverine woodland (mostly cecropias and vines) near the lookout at YRS (T)

Grey-crowned Flycatcher  Tolmomyias poliocephalus
This seemed to be the common Tolmomyias at YRS. It was certainly heard or seen on c.4 occasions in tall trees along the main road, once in riverine woodland by the Río Tiputini and seen twice from close range at the top of the canopy tower (T)

Golden-crowned Spadebill  Platyrinchus coronatus
Two heard singing their high-pitched trills at YRS

Whiskered Flycatcher  Myiobius barbatus
One individual seen in undergrowth in the primate plot at YRS

Handsome Flycatcher  Myiophobus pulcher
Commonly seen with subcanopy flocks at CSI and Guacamayos ridge

Flavescent Flycatcher  Myiophobus flavicans
A pair seen in lower growth at Guacamayos ridge, and fairly common at CSI

Cinnamon Flycatcher  Pyrrhomyias cinnamomea
Common at CSI and on Guacamayos ridge

[Eastern Wood-pewee Contopus virens]
One wood-pewee seen at YRS was probably this species on range although it seemed to have an all-dark lower mandible. It never vocalized

Smoke-coloured Pewee  Contopus fumigatus
Common at CSI

Olive-sided Flycatcher  Contopus cooperi
Several seen foraging from high dead snags at CSI

Euler's Flycatcher  Lathrotriccus euleri
One heard singing in terra firma in the primate plot at YRS

Black Phoebe  Sayornis nigricans
A few in open areas at CSI

Yellow-bellied Chat-tyrant  Ochthoeca diadema
A few seen or heard in undergrowth on Guacamayos ridge

Drab Water-tyrant Ochthornis littoralis
Fairly common along the Río Tiputini at YRS

Bright-rumped Attila  Attila spadiceus
One heard, another seen in shrubbery along the main road at YRS

Cinnamon Attila  Attila cinnamomeus
2-3 heard at YRS in várzea along the Laguna trail, one of these seen after playback (T)

Greyish Mourner  Rhytipterna simplex
c.3 heard in early mornings at YRS

Dusky-capped Flycatcher  Myiarchus tuberculifer
One seen at YRS, another at Guacamayos ridge (two different races) (T)

Pale-edged Flycatcher  Myiarchus cephalotes
A few individuals in young secondary growth at CSI (T)

Great Kiskadee  Pitangus sulphuratus
Fairly common at YRS: c.10 encountered, especially along the Laguna trail (T)

Lesser Kiskadee Philohydor lictor
c.3 pairs seen or heard regularly around the lagunas at YRS (T)

Boat-billed Flycatcher  Megarhynchus pitangua
Common at YRS: c.15 seen or heard, mostly in riverine or lakeside habitat (T)

Social Flycatcher  Myiozetetes similis
Common at YRS: c.20 seen or heard, particularly around the station or along rivers/lakeside

Grey-capped Flycatcher  Myiozetetes granadensis
Common at YRS: c.20 encountered as above

Streaked Flycatcher  Myiodynastes maculatus
A few (c.5) individuals seen at YRS, mostly accompanying foraging flocks

Golden-crowned Flycatcher  Myiodynastes chrysocephalus
Small numbers in canopy at CSI

Piratic Flycatcher  Legatus leucophaius
Fairly common at YRS: c.10 recorded, mostly by voice (T)

Variegated Flycatcher  Empidonomus varius
Uncommon at YRS: c.3 seen with foraging flocks along the main road

Crowned Slaty Flycatcher  Empidonomus aurantioatrocristatus
1-2 seen perched on high canopies along the main road at YRS

Sulphury Flycatcher  Tyannopsis sulphurea
One individual was seen at YRS, eating berries in roadside regrowth, perching on top of viny trees. It was not directly associating with palms although there were palms and swampy areas near by

Tropical Kingbird  Tyrannus melancholicus
Very common at YRS: c.50 seen in canopies throughout the area, but mainly along the road. Also present in small numbers at CSI

Eastern Kingbird  Tyrannus tyrannus
One group of c.5 individuals perched on tall canopies at YRS looked like recently arrived migrants

BARRED BECARD  Pachyramphus versicolor
One seen one Guacamayos ridge, another at CSI

Chestnut-crowned Becard  Pachyramphus castaneus
One seen with mixed flock along main road at YRS

White-winged Becard  Pachyramphus polychopterus
c.3 seen and a few vocalising along the main road at YRS

Black-capped Becard  Pachyramphus marginatus
One male seen at YRS

Black-tailed Tityra  Tityra cayana
Fairly common at YRS: c.5 seen

Green-and-black Fruiteater  Pipreola rieferii
Several seen and heard at CSI and Guacamayos ridge

Black-chested Fruiteater  Pipreola lubomirskii
One heard singing at CSI

White-browed Purpletuft  Iodopleura isabellae
A party of c.5 seen at YRS feeding on berry-bearing vines along the main road (with a Sulphury Flycatcher)

Cinereous Mourner  Laniocera hypopyrra
c.4 heard at their song-posts (T)

Olivaceous Piha  Lathria cryptolophus
A lethargic pair watched at close range at c.1950 m on the pipeline trail, Guacamayos ridge

Screaming Piha  Lipaugus vociferans
Fairly common at YRS: c.10 heard, one seen (T)

Dusky Piha  Lipaugus fuscocinereus
One silent individual watched foraging in mid-strata at Guacamayos ridge, c.2050 m

Plum-throated Cotinga  Cotinga maynana
One female seen from the canopy platform at YRS

Purple-throated Fruitcrow  Querula purpurata
c.5 heard at YRS (T)

Bare-necked Fruitcrow  Gymnoderus foetidus
One seen flying over the river at YRS

Black-necked Red-cotinga  Phoenicircus nigricollis
One female at YRS watched feeding on mid-strata berries, giving a loud sharp woodpecker-like single note

Andean Cock-of-the-rock  Rupicola peruviana
One female seen in mid-strata at CSI

Golden-headed Manakin  Pipra erythrocephala
Fairly common at YRS: c.5 males encountered at their ridge-top display-posts (T)

White-crowned Manakin  Dixiphia pipra
One male and one female encountered at YRS

Blue-capped Manakin Lepidothrix coronata
At YRS, commonly heard (c.15) and a few seen (T)

Blue-backed Manakin  Chiroxiphia pareola
One female or young male seen at YRS, and several birds heard calling from their song-posts (T)

Striped Manakin  Machaeropterus regulus
One female seen at YRS

Dwarf Tyrant-manakin  Tyranneutes stolzmanni
Uncommon at YRS: c.5 males heard at their song-posts (T)

Wing-barred Piprites  Piprites chloris
c.5 heard at YRS, mostly independent from foraging flocks (T)

Varzea Schiffornis  Schiffornis major
Two heard from a boat on the Tiputini downstream from YRS

Violaceous Jay  Cyanocorax violaceus
Seen or heard fairly commonly at YRS, especially along the main road

Turquoise Jay  Cyanocorax turcosa
Fairly common at Guacamayos ridge

Black-billed Peppershrike  Cyclarhis nigrirostris
One seen with a mixed-flock in low trees near the virgin at Guacamayos ridge; several seen or heard at CSI where it seemed quite common with mixed-flocks in the canopy

Red-eyed Vireo  Vireo olivaceus
Fairly common at YRS: c.15 seen or heard in canopy flocks

Brown-capped Vireo  Vireo leucophrys
Common and vocal with flocks at CSI and Guacamayos ridge (T)

Dusky-capped Greenlet  Hylophilus hypoxanthus
Regularly heard and occasionally seen in mixed-species canopy flocks at YRS (T)

Tawny-crowned Greenlet  Hylophilus ochraceiceps
Regularly heeard accompanying lower-strata flocks at YRS (T)

Andean Solitaire  Myadestes ralloides
Often heard at CSI and Guacamayos ridge, and a few seen (T)

Pale-eyed Thrush  Platycichla leucops
Many males were in song at CSI, perched conspicuously on high boughs (T)

Glossy-black Thrush  Turdus serranus
Common and vocal at CSI and Guacamayos ridge

Chestnut-bellied Thrush  Turdus fulviventris
One seen foraging in canopy at lower end of pipeline trail, Guacamayos ridge

Black-billed Thrush  Turdus ignobilis
Regularly seen or heard around the station itself at YRS (T)

Lawrence's Thrush  Turdus lawrencii
Seemed especially common at YRS: at least 10 were heard or seen singing their remarkable songs (T)

Hauxwell's Thrush  Turdus hauxwelli
1-2 heard singing along the beginning of the Laguna trail at YRS (T)

White-necked Thrush  Turdus albicollis
One seen at YRS

Brown-chested Martin  Progne tapera
c.10 seen around the Río Napo crossing

Grey-breasted Martin  Progne chalybea       
c.20 seen in the lowlands, mostly along rivers

White-winged Swallow  Tachycineta albiventer       
c.3 at the Río Napo crossing

Blue-and-white Swallow  Notiochelidon cyanoleuca
Common at Guacamayos ridge and CSI

White-banded Swallow  Atticora fasciata
c.30 seen in total at YRS, mostly around the river lookout on the Tiputini (where nesting), or further downstream

White-thighed Swallow  Neochelidon tibialis
c.5 seen along the main road at YRS

Southern Rough-winged Swallow  Stelgidopteryx ruficollis 
1-2 around the Napo

Barn Swallow  Hirundo rustica
c.3 flew over the Río Napo

Black-capped Donacobius  Donacobius atricapillus
One along the main road in a swampy patch

Thrush-like Wren  Campylorhynchus turdinus
c.10 encountered at YRS, mostly by voice (T)

Rufous Wren  Cinnycerthia unirufa
Two groups high on the pipeline trail at Guacamayos ridge

Sepia-brown Wren  Cinnycerthia olivascens
Several groups at CSI and low down on the pipeline trail, Guacamayos ridge

Plain-tailed Wren  Thryothorus euophrys
Vocalisations heard a few times from large bamboo clumps at CSI

Coraya Wren  Thryothorus coraya
One seen in vine-tangled forest at YRS

House Wren  Troglodytes aedon
c.5 seen or heard at YRS; often around the station

Mountain Wren  Troglodytes solstitialis
Common and vocal at CSI and Guacamayos ridge (T)

Grey-breasted Wood-wren  Henicorhina leucophrys
Common at CSI and Guacamayos ridge (T)

Southern Nightingale-wren  Microcerculus marginatus
Common at YRS: c.20 heard and 2-3 seen (T)

Long-billed Gnatwren  Ramphocaenus melanurus
One in vine-tangled forest at YRS (T)

Tropical Parula  Parula pitiayumi
1-2 seen with canopy flocks at YRS and CSI

Blackburnian Warbler  Dendroica fusca
Common in canopy flocks at CSI and Guacamayos ridge in March; many stunning fresh-plumaged males

Canada Warbler  Wilsonia canadensis
Several summer-plumaged birds seen at CSI and Guacamayos ridge

Slate-throated Whitestart  Myioborus miniatus
Common at CSI (T)

Spectacled Whitestart  Myioborus melanocephalus
Fairly common at CSI and common at Guacamayos ridge

Black-crested Warbler  Basileuterus nigrocristatus
Common at CSI and Guacamayos ridge (T)

Citrine Warbler Basileuterus luteoviridis
Fairly common at CSI and Guacamayos ridge (T)

Three-striped Warbler  Basileuterus tristriatus
Common at CSI and Guacamayos ridge (T)

Russet-crowned Warbler  Basileuterus coronatus
Common in undergrowth at CSI and Guacamayos ridge: many seen or heard

Purple Honeycreeper  Cyanerpes caeruleus
Common at YRS: c.30 birds seen in total, in groups of up to 6 birds

Green Honeycreeper  Chlorophanes spiza
Fairly common at YRS: c.5 seen with canopy flocks (T)

Golden-collared Honeycreeper  Iridophanes pulcherrima
Found in three flocks at CSI: three males in one flock and a pair in two others

Blue Dacnis  Dacnis cayana
One female seen from the canopy platform at YRS

Black-faced Dacnis  Dacnis lineata
Three seen accompanying canopy flocks at YRS

Bluish Flowerpiercer  Diglossopis caerulescens
Common at CSI, especially by voice (T)

Masked Flowerpiercer  Diglossa cyanea
Common at CSI and Guacamayos ridge (T)

Golden-eyed Flowerpiercer  Diglossopis glauca
One seen in a canopy flock at the lower end of the pipeline trail, Guacamayos ridge

Yellow-backed Tanager  Hemithraupis flavicollis
Four seen at YRS, mostly from the canopy platform

Fawn-breasted Tanager  Pipraeidea melanonota
Fairly common in canopy flocks at CSI and Guacamayos ridge

Thick-billed Euphonia  Euphonia laniirostris
c.5 seen at YRS

Golden-rumped Euphonia  Euphonia cyanocephala
Several in canopy flocks at CSI

Orange-bellied Euphonia  Euphonia xanthogaster
A few with canopy flocks at YRS

Rufous-bellied Euphonia  Euphonia rufiventris
Heard c.5 times (and seen once or twice) with canopy flocks at YRS

White-lored Euphonia  Euphonia chrysopasta
c.10 heard or seen at YRS, mostly in canopy flocks along the main road

Golden Tanager  Tangara arthus
A few seen with canopy flocks on Guacamayos ridge

Saffron-crowned Tanager  Tangara xanthocephala
Fairly common in canopy flocks at CSI and Guacamayos ridge

Flame-faced Tanager  Tangara parzudakii
Several seen on Guacamayos ridge

Beryl-spangled Tanager  Tangara nigroviridis
Fairly common at CSI and Guacamayos ridge (two nests found)

Blue-and-black Tanager  Tangara vassorii
Common at Guacamayos ridge: c.40 seen in September

Black-capped Tanager  Tangara heinei
Fairly common in degraded habitat at CSI

Turquoise Tanager  Tangara mexicana
c.5 seen with canopy flocks at YRS

Opal-rumped Tanager  Tangara velia
Two seen with canopy flocks from the platform at YRS

Opal-crowned Tanager  Tangara callophrys
c.5 seen in canopy flocks at YRS, mostly from the canopy platform

Paradise Tanager  Tangara chilensis
Common at YRS: at least 20 seen with canopy flocks

Green-and-gold Tanager  Tangara schrankii
c.5 seen with canopy flocks

Yellow-bellied Tanager  Tangara xanthogastra
c.5 seen with canopy flocks at YRS

Bay-headed Tanager  Tangara gyrola
Only one seen at YRS

Orange-eared Tanager  Chlorochrysa calliparaea
One at Guacamayos ridge

Scarlet-bellied Mountain-tanager  Anisognathus igniventris
A few on Guacamayos ridge

Lacrimose Mountain-tanager  Anisognathus lacrymosus
Several seen high up on Guacamayos ridge

Blue-winged Mountain-tanager  Anisognathus somptuosus
Fairly common at CSI and Guacamayos ridge

Hooded Mountain-tanager  Buthraupis montana
Fairly common at Guacamayos ridge: c.10 seen on each visit

Grass-green Tanager  Chlorornis riefferii
Common high up on Guacamayos ridge

Blue-grey Tanager  Thraupis episcopus
c. 10 seen at YRS

Palm Tanager  Thraupis palmarum
c.5 seen at YRS

Silver-beaked Tanager  Ramphocelus carbo
c.5 seen in trashed habitat at YRS

Masked Crimson Tanager  Ramphocelus nigrogularis
c.10 seen in riverside habitat at YRS, especially opposite the lookout

Summer Tanager  Piranga rubra
Two in canopy flocks at CSI

White-shouldered Tanager  Tachyphonus luctuosus
c.5 seen accompanying flocks at YRS

Fulvous Shrike-tanager  Lanio fulvus
One male seen in riverside trees 2 km down the Tiputini from YRS

Common Bush-tanager  Chlorospingus ophthalmicus
Common at CSI and Guacamayos ridge

Yellow-throated Bush-tanager  Chlorospingus flavigularis
Three seen at Guacamayos ridge, all low down on trail

Black-capped Hemispingus  Hemispingus atropileus
One seen at Guacamayos ridge

Oleaginous Hemispingus  Hemispingus frontalis
One seen well in a mid-strata flock at CSI, another possibly at Guacamayos ridge

Black-eared Hemispingus  Hemispingus melanotis
Fairly common in bamboo and undergrowth at CSI (T)

Magpie Tanager  Cissopis leveriana
c.5 seen in riverside regrowth

White-capped Tanager  Sericossypha albocristata
Heard loudly on both visits to the Guacamayos ridge, but not seen (T)

Greyish Saltator  Saltator coerulescens
Two heard at YRS, along the Río Tiputini in degraded habitat

Slate-coloured Saltator Saltator grossus
c.4 heard in tall forest at YRS (T)

Red-capped Cardinal  Paroaria gularis
A few at YRS, around the lookout over the Tiputini

Chestnut-bellied Seedeater  Sporophila castaneiventris
c.5 around the station at YRS

White-rimmed Brush-finch  Atlapetes leucopis
One heard singing at Guacamayos ridge (c.100 down from house on pipeline trail) and brought into view with playback (T)

Chestnut-capped Brush-finch  Buarremon brunneinucha
Common in lower growth at CSI (T)

Stripe-headed Brush-finch  Buarremon torquatus
One individual seen at CSI

Yellow-browed Sparrow  Ammodramus aurifrons
A few around the station at YRS

Yellow-rumped Cacique  Cacicus cela
Common at YRS: c.50 seen or heard (T)

Northern Mountain-cacique  Cacicus leucoramphus
Common at CSI and Guacamayos ridge (T)

Subtropical Cacique  Cacicus uropygialis
A few seen at CSI

Solitary Cacique  Cacicus solitarius
Two seen opposite the lookout over the Río Tiputini

Crested Oropendola  Psarocolius decumanus
c.5 seen or heard at YRS

Russet-backed Oropendola  Psarocolius angustifrons
Very common at YRS and CSI: 100s seen and heard (T)

Giant Cowbird Molothrus oryzivora
One seen flying over the Río Tiputini at YRS

Moriche Oriole  Icterus chrysocephalus
c.3 seen in roadside canopies towards the canopy platform at YRS

Orange-backed Troupial  Icterus croconotus
One heard singing along the Tiputini at YRS

Olivaceous Siskin  Carduelis olivacea
Fairly common at CSI