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Popular traits
4,118 species in Yellowstone National Park
Sphyrapicus nuchalis
Columba livia
Falco peregrinus
Cardellina pusilla
Aythya americana
Bonasa umbellus
Spatula clypeata
Contopus cooperi
Empidonax hammondii
Canis lupus
Urocitellus armatus
Zenaida macroura
Aeronautes saxatalis
Recurvirostra americana
Haemorhous mexicanus
Anas acuta
Anthus rubescens
Ovis canadensis
Certhia americana
Picoides dorsalis
Pinicola enucleator
Odocoileus hemionus
Bubo virginianus
Riparia riparia
Chordeiles minor
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