Species:
50; in 1 day (no guide)
50; 1 day high tally

Birding:
***  I was a bit disappointed with Monterrico and Parque Hawaii. The countless hectares of sugarcane on the drive in were nearly devoid of birds. The mangroves and sea offer a great chance though to pick us some extra species.  Get a kayak, you’ll want it. 

Trails:
A trail system wasn’t really developed that we could tell. We birded the roads and beach while on land. There was a nice mangrove kayak/canoe tour though.

Where:
Far southeastern Guatemala. The Parque leads right out into the Pacific.

How Do I get there:

There are several buses going into Monterrico from Puerto San Jose. Escuintla, a major hub, is 2 1/2 hrs by bus. There are also direct shuttles from Antigua and Guatemala City. You could also probably take a rent-a-car .

Accomodations:
We stayed at the ARCAS—Monterrico Turtle station which was about $8 a night in a bunkhouse with mosquito nets with a commitment to hike 8km a night looking for eggs, minimum 1 week stay (negotiable). As far as I know, not  much else in the vicinity of Parque Hawaii besides this though.

Note: Monterrico is at least 8km away from Parque Hawaii!Monterrico has a variety of cheap and nice places to stay.

What to bring:
Good flashlight/headlamp, You’ll want it when you’re hiking the beaches at night.
Food, they make a community meal at the ARCAS bunkhouse that they take turns cooking . 
Mosquito spray and sun screen.
Kayak and dry bag, we got our kayak from ARCAS and we brought our dry bags.

Birds.

Phalacrocoraciadae
1. Neotropical Cormorant                         Phalacocorax brasilianus

Podicipedidae
2. Least Grebe                                        Tachybaptus dominicus

Fregatidae
3. Magnificent Frigatebird                       Fregata magnificens

Pelecanidae
4. Brown Pelican                                      Pelecanus erythrorhynchos

Ardeidae
5. Great Egret                                        Ardea alba
6. Snowy Egret                                       Garza Nivea                  
7. Green Heron                                       Garza Verde
8. Reddish Egret                                     Egretta rufescens
9. Yellow-crowned Night-heron                  Nyctanassa violacea

Ciconiidae
10. Wood Stork                                       Mycteria americana

Cathartidae
11. Black Vulture                                     Coragyps atratus
12. Turkey Vulture                                  Carthartes aura

Accipitridae
13. Broad-winged Hawk                             Buteo platypterus
14. Short-tailed Hawk                              Buteo brachyurus
15. Mangrove Black Hawk                          Buteogallus sutilis
16. White-tailed Kite                               Elanus leucurus

Pandionidae
17. Osprey                                             Pandion haliaetus

Falconidae
18. Merlin                                              Falco columbarius
19. American Kestrel                                Falco sparverius

Rallidae
20. Grey-necked Wood-rail                       Aramides cajanea

Laridae
21. Black Tern                                        Chlidonias niger
22. Royal Tern                                        Sterna maxima

Columbidae
23. Ruddy Ground-dove                             Columbina talpacoti
24. Plain-breasted Ground-dove                 Columbina minuta
25. Inca Dove                                         Columbina inca
26. White-tipped Dove                             Leptotila verreauxi

Psittacidae
27. Orange-chinned Parakeet                     Brotogeris jugularis

Cuculidae
28. Mangrove Cuckoo                                Coccyzus minor
29. Squirrel Cuckoo                                 Piaya cayana
30. Groove-billed Ani                               Crotophaga sulcirostris

Strigidae
31. Pacific Screech-owl                            Otus cooperi

Caprimulgidae
32. Common Paraque                                 Nyctridromus albicollis

Alcedinidae
33. Green Kingfisher                                Chloroceryle Americana
34. Pygmy Kingfisher                                Chloroceryle aenea
35. Belted Kingfisher                               Ceryle alcyon

Tyrannidae
36. Great Kiskadee                                  Piangus sulphuratus
37. Tropical Kingbird                               Tyrannus melancholicus
38. Rose-throated Becard             Pachyramphus aglaiae

Hirundinidae
39. Gray-breasted Martin             Progne chalybea
40. Barn Swallow                                                Hirundo rustica
41. Mangrove Swallow                              Tachycineta albilinea

Troglodytidae
42, Rufous-naped Wren                            Campylorhynchus rufinucha

Parulidae
43. Tennessee Warbler                            Vermivora peregrine
44. Prothonotary Warbler                        Protonotaria citrea
45. Mangrove (yellow) arbler                     Dendroica erithachorides
46. Yellow Warbler                                 Dendroica petechia
47. Northern Waterthrush                       Seiurus noveboracensis
48. Black-and-white Warbler                    Mniotilta varia
49. American Redstart                             Setophaga ruticilla

Icteridae
50. Altamira Oriole                                 Icterus gularis

Info also at - http://worldbirdingexpeditions.blogspot.com/