Animals
| Category | Group | Common Name | Genus | Species |
|---|---|---|---|---|
| Bird | Owls and Nightjars | Lesser Nighthawk | Chordeiles | acutipennis |
| Bird | Wrens | House Wren | Troglodytes | aedon |
| Bird | Cowbirds | Bronzed Cowbird | Molothrus | aeneus |
| Bird | Waterbird | Lesser Scaup | Aythya | affinis |
| Reptile | Turtles | Desert Tortoise | Gopherus | agassizii |
| Mammal (Small) | Mice and Rats | Pacific Kangaroo Rat | Dipodomys | agilis |
| Bird | Owls and Nightjars | Barn Owl | Tyto | alba |
| Bird | Waders | Great Egret | Ardea | alba |
| Bird | Shorebirds | Sanderling | Calidris | alba |
| Bird | Waterbird | Bufflehead | Bucephala | albeola |
| Bird | Sparrows | White-Throated Sparrow | Zonotrichia | albicollis |
| Bird | Waterbird | Greater White-Fronted Goose | Anser | albifrons |
| Mammal (Small) | Mice and Rats | White-Throated Woodrat | Neotoma | albigula |
| Mammal (Small) | Voles, Muskrat, and Lemmings | White-Footed Vole | Arborimus | albipes |
| Bird | Woodpeckers | White-Headed Woodpecker | Picoides | albolarvatus |
| Bird | Kingfishers | Belted Kingfisher | Megaceryle | alcyon |
| Bird | Auks | Cassin's Auklet | Ptychoramphus | aleuticus |
| Bird | Hummingbirds | Black-Chinned Hummingbird | Archilochus | alexandri |
| Bird | Shorebirds | Snowy Plover | Charadrius | alexandrinus |
| Bird | Larks | Horned Lark | Eremophila | alpestris |
| Bird | Shorebirds | Dunlin | Calidris | alpina |
| Mammal (Small) | Chipmunks | Alpine Chipmunk | Tamias | alpinus |
| Mammal (Small) | Mice and Rats | White-Eared Pocket Mouse | Perognathus | alticolus |
| Amphibian | Toads | Colorado River Toad | Incilius | alvarius |
| Mammal (Large) | Deer, Moose, and Caribou | Pronghorn | Antilocapra | americana |
| Mammal (Medium) | Mustelids | American Marten | Martes | americana |
| Bird | Rails and Coots | American Coot | Fulica | americana |
| Bird | Waders | American Avocet | Recurvirostra | americana |
| Bird | Waders | Wood Stork | Mycteria | americana |
| Bird | Waterbird | American Wigeon | Anas | americana |
| Bird | Waterbird | Redhead | Aythya | americana |
| Bird | Creepers | Brown Creeper | Certhia | americana |
| Bird | Shorebirds | Long-Billed Curlew | Numenius | americanus |
| Mammal (Medium) | Rabbits, Hares and Pika | Snowshoe Hare | Lepus | americanus |
| Mammal (Large) | Bears | Black Bear | Ursus | americanus |
| Bird | Cuckoos | Yellow-Billed Cuckoo | Coccyzus | americanus |
| Bird | Grosbeaks and Bunting | Lazuli Bunting | Passerina | amoena |
| Mammal (Small) | Chipmunks | Yellow-Pine Chipmunk | Tamias | amoenus |
| Mammal (Large) | Seals and Sea-Lions | Northern Elephant Seal | Mirounga | angustirostris |
| Bird | Hummingbirds | Anna's Hummingbird | Calypte | anna |
| Bird | Gulls and Terns | Least Tern | Sterna | antillarum |
| Bird | Shorebirds | Ancient Murrelet | Synthliboramphus | antiquus |
| Bird | Woodpeckers | Black-Backed Woodpecker | Picoides | arcticus |
| Bird | Gulls and Terns | Herring Gull | Larus | argentatus |
| Mammal (Large) | Goats and Sheep | Domestic Sheep | Ovis | aries |
| Mammal (Small) | Mice and Rats | Arizona Cotton Rat | Sigmodon | arizonae |
| Bird | Doves | White-Winged Dove | Zenaida | asiatica |
| Mammal (Large) | Equines | Feral Ass | Equus | asinus |
| Mammal (Medium) | Raccoon and Ringtail | Ringtail | Bassariscus | astutus |
| Amphibian | Salamanders | Scott Bar Salamander | Plethodon | asupak |