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641 species found for “opportunistic” in Asia
Tundra Swan
Cygnus columbianus
Greater Scaup
Aythya marila
Chukar
Alectoris chukar
Ruddy Turnstone
Arenaria interpres
Ivory Gull
Pagophila eburnea
Sabine's Gull
Xema sabini
Black-headed Gull
Chroicocephalus ridibundus
Little Gull
Hydrocoloeus minutus
Mew Gull
Larus canus
Herring Gull
Larus argentatus
Glaucous Gull
Larus hyperboreus
Bridled Tern
Onychoprion anaethetus
Gull-billed Tern
Gelochelidon nilotica
Black Tern
Chlidonias niger
Black-footed Albatross
Phoebastria nigripes
Laysan Albatross
Phoebastria immutabilis
Short-tailed Albatross
Phoebastria albatrus
Northern Fulmar
Fulmarus glacialis
Short-tailed Shearwater
Ardenna tenuirostris
Flesh-footed Shearwater
Ardenna carneipes
Cattle Egret
Bubulcus ibis
Golden Eagle
Aquila chrysaetos
Northern Goshawk
Accipiter gentilis
Snowy Owl
Bubo scandiacus
Long-eared Owl
Asio otus
Merlin
Falco columbarius
European Starling
Sturnus vulgaris
Bohemian Waxwing
Bombycilla garrulus
Eurasian Tree Sparrow
Passer montanus
Common Redpoll
Acanthis flammea
White-winged Crossbill
Loxia leucoptera
Gracile Goshawk
Accipiter quartus
Spot-tailed Goshawk
Accipiter trinotatus
Aquila antiqua
Aquila antiqua
Greater Spotted Eagle
Aquila clanga
Gurney's Eagle
Aquila gurneyi
Indian Spotted Eagle
Aquila hastata
Imperial Eagle
Aquila heliaca
Lesser Spotted Eagle
Aquila pomarina
Tawny Eagle
Aquila rapax
Aquila Pennatoides
Aquila pennatoides
Gray-faced Buzzard
Butastur indicus
Common Buzzard
Buteo buteo
Buteo conterminus
Buteo conterminus
Long-legged Buzzard
Buteo rufinus
Pallid Harrier x Montagu's Harrier
Circus macrourus x pygargus
Pallid Harrier
Falco macrourus
Bearded Vulture
Gypaetus barbatus
White-rumped Vulture
Gyps bengalensis
Himalayan Griffon
Gyps himalayensis
Indian Vulture
Gyps indicus
Slender-billed Vulture
Gyps tenuirostris
Gyps vulgaris
Gyps vulgaris
White-tailed Eagle
Haliaeetus albicilla
Lesser Fish-Eagle
Haliaeetus humilis
Pallas's Fish-Eagle
Haliaeetus leucoryphus
Haliaeetus nisus
Haliaeetus nisus
Steller's Sea-Eagle
Haliaeetus pelagicus
Brahminy Kite
Haliastur indus
Black Eagle
Ictinaetus malayensis
Milvus incertus
Milvus incertus
Black Kite
Milvus migrans
Red Kite x Black Kite
Milvus milvus x migrans
Egyptian Vulture
Neophron percnopterus
Blyth's Hawk-Eagle
Nisaetus alboniger
Javan Hawk-Eagle
Nisaetus bartelsi
Flores Hawk-Eagle
Nisaetus floris
Changeable Hawk-Eagle
Nisaetus limnaeetus
Palaetus rapax
Palaetus rapax
Barred Honey-buzzard
Pernis celebensis
Promilio brodkorbi
Promilio brodkorbi
Red-headed Vulture
Sarcogyps calvus
Philippine Duck
Anas luzonica
Anas melanoleuca
Anas melanoleuca
Risgo Duck
Anas risgoviensis
Rustic Duck
Anas rustica
Greater White-fronted Goose x Lesser White-fronted Goose
Anser albifrons x erythropus
Swan Goose x Bar-headed Goose
Anser cygnoides x indicus
Devjatkin's Goose
Anser devjatkini
Wandering Whistling-Duck
Dendrocygna arcuata
Eremochen russelli
Eremochen russelli
Matanas enrighti
Matanas enrighti
Anas natator
Anas natator
Anser anatoides
Anser anatoides
Presbychen Abavus
Presbychen abavus
Lambrechts's Duck
Archeoquerquedula lambrechti
Magna Duck
Paranyroca magna
Brown Hornbill
Anorrhinus austeni
Oriental Pied-Hornbill
Anthracoceros albirostris
Black Hornbill
Anthracoceros malayanus
Palawan Hornbill
Anthracoceros marchei
White-crowned Hornbill
Berenicornis comatus
Malabar Gray Hornbill
Ocyceros griseus
Blyth's Hornbill
Rhyticeros plicatus
Upupa paradisea
Upupa paradisea
Caprimulgus aegypius
Caprimulgus aegypius
Indian Nightjar
Caprimulgus asiaticus
Beach Thick-knee
Esacus magnirostris
Kentish Plover
Charadrius alexandrinus
Eurasian Dotterel
Charadrius morinellus
River Lapwing
Vanellus duvaucelii
Red-wattled Lapwing
Vanellus indicus
Spur-winged Lapwing
Vanellus spinosus
Australian Pratincole
Stiltia isabella
Lesser Noddy
Anous tenuirostris
Brown-headed Gull
Chroicocephalus brunnicephalus
Saunders's Gull
Chroicocephalus saundersi
Australian Tern
Gelochelidon macrotarsa
Pallas's Gull
Ichthyaetus ichthyaetus
White-eyed Gull
Ichthyaetus leucophthalmus
Mediterranean Gull
Ichthyaetus melanocephalus
Relict Gull
Ichthyaetus relictus
Arctic Gull
Larus arcticus
European Herring Gull
Larus argenteus
Armenian Gull
Larus armenicus
Caspian Gull
Larus cachinnans
Caspian Gull x European Herring Gull
Larus cachinnans x argentatus
Caspian Gull x Yellow-legged Gull
Larus cachinnans x michahellis
Elmore's Gull
Larus elmorei
Glaucous-winged Gull
Larus glaucodes
Great Black-headed Gull
Larus icthyaetus
Kamchatka Gull
Larus kamtschatschensis
Lake Gull
Larus lacus
Lesser Black-backed Gull
Larus medius
Yellow-legged Gull
Larus michahellis
Perpetual Gull
Larus perpetuus
Slaty-backed Gull
Larus schistisagus
Speculative Gull
Larus spec
Vega Gull
Larus vegae
Sooty Tern
Sterna fuliginosa
Philomachus binagadensis
Philomachus binagadensis
Elorius paludicola
Elorius paludicola
Azov Snipe
Gallinago azovica
Solitary Snipe
Gallinago solitaria
Pin-tailed Snipe
Gallinago stenura
Tringa gracilis
Tringa gracilis
Totanus grivensis
Totanus grivensis
Wood Sandpiper
Tringa glareola
Wandering Tattler
Tringa incana
Tringa ocrophus
Tringa ocrophus
South Polar Skua
Stercorarius maccormicki
Parasitic Jaeger
Stercorarius parasiticus
Pomarine Jaeger
Stercorarius pomarinus
Turnix maculatus
Turnix maculatus
Laurillard's Agnopterus
Agnopterus laurillardi
White Stork
Ciconia ciconia
Black Stork
Ciconia nigra
Black-necked Stork
Ephippiorhynchus asiaticus
Lesser/Greater Adjutant
Leptoptilos javanicus
Leptoptilos pliocenicus
Leptoptilos pliocenicus
Leptoptilos robustus
Leptoptilos robustus
Leptoptilos siwalicensis
Leptoptilos siwalicensis
Leptoptilos titan
Leptoptilos titan
Nicobar Pigeon
Caloenas nicobarica
Pale-backed Pigeon
Columba eversmanni
Columba hispida
Columba hispida
Hill Pigeon
Columba rupestris
Parnasiensis Pigeon
Eimeria parnasiensis
Amboyna Cuckoo-Dove
Macropygia amboinensis
Philippine Cuckoo-Dove
Macropygia tenuirostris
Wetar Ground Dove
Pampusana hoedtii
Red-naped Fruit-Dove
Ptilinopus dohertyi
Superb Fruit-Dove
Ptilinopus superbus
Laughing Dove
Spilopelia senegalensis
Spotted Kingfisher
Actenoides lindsayi
Alcedo moluccana
Alcedo moluccana
Alcedo orientalis
Alcedo orientalis
Little Kingfisher
Ceyx pusillus
Black-capped Kingfisher
Halcyon pileata
Crested Kingfisher
Megaceryle lugubris
Cinnamon-banded Kingfisher
Todiramphus australasia
Collared Kingfisher
Todiramphus chloris
Sacred Kingfisher
Todiramphus sanctus
Coracias puella
Coracias puella
Blue-throated Bee-eater
Merops viridis
Red-bearded Bee-eater
Nyctyornis amictus
Coral-billed Ground-Cuckoo
Carpococcyx renauldi
Andaman Coucal
Centropus andamanensis
Green-billed Coucal
Centropus chlororhynchos
Centropus colossus
Centropus colossus
Goliath Coucal
Centropus goliath
Centropus maximus
Centropus maximus
Black-faced Coucal
Centropus melanops
Pheasant Coucal
Centropus phasianinus
Kai Coucal
Centropus spilopterus
Rufous Coucal
Centropus unirufus
Great Spotted Cuckoo
Clamator glandarius
Red-capped Coua
Coua ruficeps
Pallid Cuckoo
Cuculus pallidus
Crishna Crow
Edolius crishna
Pacific Koel
Eudynamys orientalis
Scale-feathered Malkoha
Lepidogrammus cumingi
Zanclostomus Calyorhynchus
Zanclostomus calyorhynchus
Falco albidus
Falco albidus
Lanner Falcon
Falco biarmicus
Peregrine Falcon
Falco canadensis
Sooty Falcon
Falco concolor
Falco exilis
Falco exilis
Gracile Falcon
Falco gracilis
Spotted Kestrel
Falco moluccensis
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