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Common Babbler
Argya caudata
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Common Black Hawk
Buteogallus anthracinus
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Common Bronzewing
Phaps chalcoptera
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Common Bulbul
Pycnonotus barbatus
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Common Buzzard
Buteo buteo
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Common Chaffinch
Fringilla coelebs
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Common Chiffchaff
Phylloscopus collybita
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Common Chlorospingus
Chlorospingus flavopectus
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Common Cicadabird
Edolisoma tenuirostre
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Common Crane
Grus grus
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Common Cuckoo
Cuculus canorus
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Common Eider
Somateria mollissima
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Common Firecrest
Regulus ignicapilla
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Common Flameback
Dinopium javanense
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Common Gallinule
Gallinula galeata
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Common Goldeneye
Bucephala clangula
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Common Grackle
Quiscalus quiscula
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Common Grasshopper-Warbler
Locustella naevia
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Common Green-Magpie
Cissa chinensis
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Common Greenshank
Tringa nebularia
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Common Ground Dove
Columbina passerina
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Common Gull
Larus canus
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Common Hawk-Cuckoo
Hierococcyx varius
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Common Hill Myna
Gracula religiosa
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Common House-Martin
Delichon urbicum
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Common Iora
Aegithina tiphia
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Common Jery
Neomixis tenella
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Common Kingfisher
Alcedo atthis
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Common Loon
Gavia immer
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Common Merganser
Mergus merganser
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Common Miner
Geositta cunicularia
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Common Murre
Uria aalge
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Common Myna
Acridotheres tristis
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Common Newtonia
Newtonia brunneicauda
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Common Nighthawk
Chordeiles minor
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Common Nightingale
Luscinia megarhynchos
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Common Paradise-Kingfisher
Tanysiptera galatea
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Common Pauraque
Nyctidromus albicollis
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Common Pipistrelle
Pipistrellus pipistrellus
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Common Pochard
Aythya ferina
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Common Poorwill
Phalaenoptilus nuttallii
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Common Potoo
Nyctibius griseus
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Common Quail
Coturnix coturnix
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Common Raven
Corvus corax
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Common Redpoll
Acanthis flammea
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Common Redshank
Tringa totanus
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Common Redstart
Phoenicurus phoenicurus
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Common Ringed Plover
Charadrius hiaticula
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Common Rosefinch
Carpodacus erythrinus
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Common Sandpiper
Actitis hypoleucos
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Common Scale-backed Antbird
Willisornis poecilinotus
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Common Scimitarbill
Rhinopomastus cyanomelas
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Common Scoter
Melanitta nigra
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Common Sheath-tailed Bat
Taphozous georgianus
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Common Shelduck
Tadorna tadorna
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Common Snipe
Gallinago gallinago
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Common Square-tailed Drongo
Dicrurus ludwigii
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Common Swift
Apus apus
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Common Tailorbird
Orthotomus sutorius
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Common Tern
Sterna hirundo
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Common Tody-Flycatcher
Todirostrum cinereum
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Common True Katydid
Pterophylla camellifolia
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Common Virtuoso Katydid
Amblycorypha longinicta
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Common Waxbill
Estrilda astrild
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Common Wood-Pigeon
Columba palumbus
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Common Woodshrike
Tephrodornis pondicerianus
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Common Yellowthroat
Geothlypis trichas
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Compact Weaver
Pachyphantes superciliosus
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Confused Ground Cricket
Eunemobius confusus
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Congo Serpent-Eagle
Dryotriorchis spectabilis
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Connecticut Warbler
Oporornis agilis
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Cook's Petrel
Pterodroma cookii
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Cooper's Hawk
Accipiter cooperii
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Coopmans's Elaenia
Elaenia brachyptera
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Cope's Gray Treefrog
Dryophytes chrysoscelis
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Copper Seedeater
Sporophila bouvreuil
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Copper Sunbird
Cinnyris cupreus
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Copper-rumped Hummingbird
Saucerottia tobaci
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Copper-throated Sunbird
Leptocoma calcostetha
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Coppersmith Barbet
Psilopogon haemacephalus
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Coppery-chested Jacamar
Galbula pastazae
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Coquerel's Coua
Coua coquereli
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Coral-billed Ground-Cuckoo
Carpococcyx renauldi
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Coral-billed Scimitar-Babbler
Pomatorhinus ferruginosus
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Coraya Wren
Pheugopedius coraya
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Cordilleran Canastero
Asthenes modesta
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Cordilleran Flycatcher
Empidonax occidentalis
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Corn Bunting
Emberiza calandra
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Corn Crake
Crex crex
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Correndera Pipit
Anthus correndera
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Corsican Finch
Carduelis corsicana
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Corsican Nuthatch
Sitta whiteheadi
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Cory's Shearwater
Calonectris diomedea
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Coscoroba Swan
Coscoroba coscoroba
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Costa Rican Brushfinch
Arremon costaricensis
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Costa Rican Pygmy-Owl
Glaucidium costaricanum
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Costa Rican Warbler
Basileuterus melanotis
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Costa's Hummingbird
Calypte costae
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Cotton Pygmy-Goose
Nettapus coromandelianus
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Couch's Kingbird
Tyrannus couchii
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