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4,849 species in Grand Canyon National Park
Empidonax oberholseri
Mergus merganser
Tachycineta bicolor
Stelgidopteryx serripennis
Opuntia phaeacantha
Tyrannus verticalis
Empidonax difficilis
Cinclus mexicanus
Bombycilla cedrorum
Petrochelidon pyrrhonota
Leiothlypis ruficapilla
Echinocereus engelmannii
Ponometia elegantula
Dryobates scalaris
Falco columbarius
Empidonax hammondii
Icterus parisorum
Charadrius vociferus
Geothlypis trichas
Hirundo rustica
Falco mexicanus
Lanius ludovicianus
Ambystoma tigrinum
Sturnella neglecta
Opuntia basilaris
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