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21,203 species in Colorado
Xanthocephalus xanthocephalus
Stelgidopteryx serripennis
Larus californicus
Tyrannus tyrannus
Passerina amoena
Sialia mexicana
Meleagris gallopavo
Haemorhous cassinii
Leiothlypis celata
Podiceps nigricollis
Aix sponsa
Spizelloides arborea
Polioptila caerulea
Nucifraga columbiana
Aquila chrysaetos
Anas acuta
Quiscalus mexicanus
Certhia americana
Icteria virens
Loxia curvirostra
Catharus guttatus
Calamospiza melanocorys
Salpinctes obsoletus
Spizella breweri
Passerina caerulea
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