Checklist
for Bird-Watching at Guaria de Osa |
 |
| Sighting | Common Name | Local name | Latin Name | Size |
| Amazon Kingfisher | Martin Pescador Amazonico | Chloroceryle amazona | 29 cm. | |
| American Pygmy Kingfisher | Patrin Pescador | Enano Chloroceryle aenea | 13 cm. | |
| Baird's Trogon | Trogon Vientribermejo | Trogon bairdii | 28 cm. | |
| Bananquit | Reinita Mielera | Coereba flaveola | 9 cm. | |
| Bare-Throated Tiger Heron | Martin Peña/Garza Tigre | Tigrisoma mexicanum | 80 cm. | |
| Bay-Headed Tanger | Tangara Cabecicastaña | Tangara gyrola | 1.5 cm. | |
| Black Hawk | Gavilan Cangrejero | Buteogallus subtilis | 56 cm. | |
| Black Hooded Antshrike | Batara Negrusco | Thamnophilus bridgesi | 16.5 cm. | |
| Black Vulture | Zopilote Negro | Coragyps atratus | 64 cm. | |
| Black-Bellied Plover | Chorlito gris | Pluvialis squatarola | 30 cm. | |
| Black-Striped Sparrow | Pinzon Cabecilistado | Arremonops conirrostris | 16.5 cm. | |
| Black-Throated Trogon | Trogon Cabeciverde | Trogon rufus | 23 cm. | |
| Blck-cheeked Antwren | Tangara Hormiguera Carinegra | Habia antrimaxillaris | 18 cm. | |
| Blue Dacnis | Mielero Azulejo | Dacnis cayana | 11.5 cm. | |
| Blue-Black Grassquit | Semillerito Negro Azulado | Volatina jacarina | 10 cm. | |
| Blue-Crowned Motmot | Momoto Comun | Momotus momota | 39 cm. | |
| Blue-Gray Tanger | Tangara Azuleja | Thraupis episcopus | 15 cm. | |
| Boat-Biled Heron | Pico-Cucharra | Cochlearius cochlearius | 51 cm. | |
| Boat-Billed Flycatcher | Mosqueron Picudo | Megarhynchus piangua | 23 cm. | |
| Brown Booby | Piquero Moreno | Sula leucogaster | 70 cm. | |
| Brown Pelican | Pelicano Pardo | Pelecanus occidentalis | 109 cm. | |
| Cattle Egret | Garcilla Bueyera | Bulbucus ibis | 51 cm. | |
| Chestnut-Mandibilled Toucan | Tucan de Swainson | Ramphastos swainsonii | 53 cm. | |
| Clay-Colored Robin | Yiguirro (Costa Rica's National Bird) | Turdus grayi | 23.5 cm. | |
| Cocoa Woodcreper | Trepador Gorgianteado | Xiphorhynchus susurrans | 21.5 cm. | |
| Collared forest Falcon | Halcon de Monte Collarejo | Micrastur semitorquatus | 51cm. | |
| Common Poto | Nictibio Comun | Nictibius griseus | 38 cm. | |
| Common-Tody Flycatcher | Espatulilla Comun | Todirostrum cinereum | 9.5 cm. | |
| Crested Guan | Pava Crestada | Penelope purpurascens | 86 cm. | |
| Dotted-Winged Antwren | Hormiguerito Alipunteado | Microrhopias quixensis | 11 cm. | |
| Fiery-Billed Aracari | Tucansillo Piqui-Anaranjado | Pteroglossus frantzii | 43 cm. | |
| Golden-Hooded Tanger | Tangara Capuchidorada | Tangara larvata | 13 cm. | |
| Gray-Capped Flycatcher | Mosquero Cabecigris | Myiozetetes granadensis | 16.5 cm. | |
| Gray-Necked Wood Rail | Rascon Cuelligris | Aramides cajanea | 38 cm. | |
| Great Blue Heron | Garzon Azulado | Ardea herodius | 132 cm. | |
| Great Egret | Garceta Grande | Ardea alba | 101 cm. | |
| Great Kiskadee | Bienteveo Grande | Pitangus sulphuratus | 23 cm. | |
| Great-Tailed Crackle | Zanate Grande | Quiscalus mexicanus | 43 cm. | |
| Green Heron | Garcilla Verde | Butorides s. virescens | 43 cm. | |
| Green Honeycreeper | Mielero Verde | Chlorophanes spiza | 13 cm. | |
| Green Kingfisher | Martin Pescador Verde | Chloroceryle americana | 18 cm. | |
| Grey-Chrsted Dove | Paloma Pechigris | Leptotila cassinii | 24 cm. | |
| House Wren | Soterrey Cucarachero | Troglodytes aedon | 10 cm. | |
| King Vulture | Zopilote Rey | Sarcorampus papa | 81 cm. | |
| Laughing Falcon | Guaco | Herpetotheres cachinnans | 53 cm. | |
| Lineated Woodpecker | Carpintero Lineado | Dryocopus lineatus | 33 cm. | |
| Little Blue Heron | Garceta Azul | Egretta caerulea | 61 cm. | |
| Little Hermit | Hermitaño Enano | Phaethomis longuemareus | 9 cm. | |
| Little Tinamou | Gallineta | Crypturellus soui | 23 cm. | |
| Long-Tailed Hermit | Hermitaño Colilargo | Phaethomis superciliosus | 15 cm. | |
| Magnificent Frigatebird | Rabihorcado Magno | Fregata manificens | 91 cm. | |
| Mangrove hummingbird | Amazilia Manglera | Amazilia boucardi | 9.5 cm. | |
| Masked Tityra | Tityra Carirroja | Tityra semifasciata | 21 cm. | |
| Mealy Parrot | Loro Verde | Amazona farinosa | 38 cm. | |
| Neotropical Cormorant | Cormoran Neotropical | Phalacrocorax brasilianus | 66 cm. | |
| Northern Jacana | Jacana Centroamericana | Jacana spinosa | 23 cm. | |
| Olive-Throated Parakeet | Perico Azteco | Aratinga nana | 23 cm. | |
| Orange-Collared Manakin | Saltarin Cuellinaranja | Manacus aurantiacus | 10 cm. | |
| Ornage Chined Parakeet | Periquito Barbinaranja | Brotogeris jugularis | 18 cm. | |
| Osprey | Aguila Pescadora | Pandion haliaetus | 58 cm. | |
| Purple Gallinule | Gallareta morada | Porphyrula martinica | 33 cm. | |
| Red Capped Manakin | Saltarin Cabecirojo | Pipra mentalis | 10 cm. | |
| Red-Crowned Woodpecker | Carpintero Nuquirojo | Melanerpes rubricapillus | 17 cm. | |
| Red-Legged Honeycreeper | Mielero Patirrojo | Cyanerpes cyaneus | 11.5 cm. | |
| Red-lored Parrot | Loro Frentirojo | Amazonas autumnalis | 34 cm. | |
| Ringed Kingfisher | Martin Pescador Collarejo | Ceryle torquata | 41 cm. | |
| Roadside Hawk | Gavilan Chapulinero | Bueo magnirostris | 38 cm. | |
| Roufous-Tailed Hummingbird | Amazilia Raibirruta | Amazilia tzacatl | 10 cm. | |
| Ruddy Ground Dove | Tortolita Rojisa | Columbina talpacoti | 16.5 cm. | |
| Rufous-Tailed Jacamar | Jacamar Rabirufo | Galbula ruficauda | 23 cm. | |
| Scarlet Macaw | Guacamayo | Lapa Ara macao | 84 cm. | |
| Scarlet-Rumped Tanager | Sargento | Ramphocelus passerinii | 16 cm. | |
| Semipalmated Plover | Chorlitejo Semipalmado | Charadrius semipalmatus | 18 cm. | |
| Semipalmated Sandpiper | Correlimos Semipalmado | Calidris pusilla | 15 cm. | |
| Short-Billed Pigeon | Paloma piquicorta | Columba nigrirostris | 26.5 cm. | |
| Slaty-Tailed Trogon | Trogon Coliplomizo | Trogon massena | 30 cm. | |
| Smooth Billed Ani | Garapatero Piquiliso | Crotophaga ani | 35 cm. | |
| Snowy Egret | Garceta Nivosa | Egretta thula | 61 cm. | |
| Social Flycatcher | Mosquero Cejiblanco | Myiozetetes similis | 16 cm. | |
| Spectacled Owl | Buho de Anteojos | Pulsatrix perspicillata | 48 cm. | |
| Spotted Sandpiper | Andarrios Maculado | Actitis macularia | 19 cm. | |
| Squirrel Cuckoo | Cuco Ardilla | Piaya cayana | 46 cm. | |
| Summer Tanager | Tangara Veranera | Piranga rubra | 16.5 cm. | |
| Tropical Kingbird | Tirano Tropical | Tyrannus melancholicus | 21 cm. | |
| Turkey Vulture | Zopilote Cabecirrojo | Cathartes aura | 76 cm. | |
| Turquoise Cotinga | Cotinga Turquesa | Cotinga ridgwayi | 17.5 cm. | |
| Variable Seed Eater | Espiguero Variable | Sporophila aurita | 10.5 cm. | |
| Violaceous Trogon | Trogon violaceo | Trogon violaceus | 23 cm. | |
| Wedge-Billed woodcreeper | Trepadorcito Pico de Cuña | Glyphorhynchus spirurus | 15cm. | |
| Western Sandpiper | Correlimos Occidentalis | Calidris mauri | 16 cm. | |
| Whimbrel | Zarapito Trinador | Numenius phaeopus | 43 cm. | |
| White Ibis | Ibis Blanco | Eudocimus albus | 63 cm. | |
| White-Tailed Kite Hawk | Elanio Coliblanco | Elanus leucurus | 41 cm. | |
| White-Tipped Dove | Paloma Coliblanca | Leptotila verreauxi | 26 cm. | |
| Willet | Piguilo | Catoptophorus semipalmatus | 38 cm. | |
| Wilson's Plover | Chorlitejo Picudo | Charadrius wilsonia | 20 cm. | |
| Yellow-Billed Cotinga | Cotinga Piqui-Amarillo | Carpodectes antoniae | 21.5 cm. | |
| Yellow-Crowned Night Heron | Martinete Cabecipinto | Nyctanassa violacea | 61 cm. | |
| Yellow-Headed Caracara | Caracara Cabecigualdo | Milvago chimachima | 41 cm. |