Coachwhip _Masticophis flagellum_ D F Sonora Whipsnake _Masticophis bilineatus_ D F M Western Patch-nosed Snake _Salvadora hexalepis_ D F Mountain Patch-nosed Snake _Salvadora grahamiae_ M Glossy Snake _Arizona elegans_ D F Gopher Snake _Pituophis catenifer_ D F M Compton Kingsnake _Lampropeltis getulus_ D F Sonora Mountain Kingsnake _Lampropeltis pyromelana_ M Long-nosed Snake _Rhinocheilus lecontei_ D F Black-necked Garter Snake _Thamnophis cyrtopsis_ F M Mexican Garter Snake _Thamnophis eques_ D Checkered Garter Snake _Thamnophis marcianus_ D F Western Ground Snake _Sonora semiannulata_ D F Western Shovel-nosed Snake _Chionactis occipitalis_ D Banded Sand Snake _Chilomeniscus cinctus_ D F Mexican Black-headed Snake _Tantilla atriceps_ D F Plains Black-headed Snake _Tantilla nigriceps_ D F Sonora Lyre Snake _Trimorphodon lambda_ D F Night Snake _Hypsiglena torquata_ D F M Western Diamondback _Crotalus atrox_ D F Rattlesnake Sidewinder _Crotalus cerastes_ D Black-tailed Rattlesnake _Crotalus molossus_ F M Tiger Rattlesnake _Crotalus tigris_ F Mohave Rattlesnake _Crotalus scutulatus_ D F Arizona Black Rattlesnake _Crotalus viridis F M cerberus_ Birds of the monument This checklist is based entirely on written records of observations of birds seen in the monument. Names are in accordance with A.O.U. Checklist of North American Birds, 5th edition, 1957. (See checklist of reptiles and amphibians for description of habitats.) key to symbols: D desert habitat F foothill habitat M mountain habitat * species most often seen at lower elevations s summer resident w winter visitor p permanent resident t transient visitor