Eric Heisey:
Western Diamondback Rattlesnake (Crotalus atrox)
Eric Heisey:
Palid Bat (Antrozous pallidus)
Eric Heisey:
Ringtail (Bassariscus astutu)
Eric Heisey:
Ringtail (Bassariscus astutu)
Eric Heisey:
Montezuma Quail (Cyrtonyx montezumae)
Eric Heisey:
Grace’s Warbler
Eric Heisey:
Gila Monster (Heloderma suspectum)
Eric Heisey:
Western Diamondback (Crotalus atrox)
Eric Heisey:
Western Diamondback Rattlesnake (Crotalus atrox)
Eric Heisey:
Avocets at Sunset
Eric Heisey:
Lark Sparrow (Chondestes grammacus)
Eric Heisey:
Mexican Long-tongued Bats (Choeronycteris mexicana)
Eric Heisey:
Lesser Long-nosed Bat (Leptonycteris yerbabuenae)
Eric Heisey:
The North Rim
Eric Heisey:
Rufous-winged Sparrow (Peucaea carpalis)
Eric Heisey:
Antelope Jackrabbit (Lepus alleni)
Eric Heisey:
Yarrow's Spiny-Lizard (Sceleporus jarrovii)
Eric Heisey:
Gambel's Quail (Callipepla gambelii)
Eric Heisey:
Gambel's Quail (Callipepla gambalii)
Eric Heisey:
Greater Roadrunner (Geococcyx californianus)
Eric Heisey:
Canyon Towhee (Melozone fusca)
Eric Heisey:
Black-tailed Rattlesnake (Crotalus molossus molossus)
Eric Heisey:
Greater Short-horned Lizard (Phrynosoma hernandesi)
Eric Heisey:
Sonoran Mountain Kingsnake (Lampropeltis pyromelana pyromelana)
Eric Heisey:
Couch's Spadefoot Toad (Scaphiopus couchii)
Eric Heisey:
Canyon Treefrog (Hyla arenicolor)
Eric Heisey:
Quaking Aspen (Populus tremuloides)
Eric Heisey:
Cassin's Kingbirds (Tyrannus vociferans)
Eric Heisey:
Rose-throated Becard (Pachyramphus aglaiae)
Eric Heisey:
Thick-billed Kingbird (Tyrannus crassirostris)
