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Western rat snake
The western rat snake (''Pantherophis obsoletus'') — also known as the Texas ratsnake,〔(''Pantherophis obsoletus'' ), The Reptile Database. www.reptile-database.org.〕 black rat snake, pilot black snake, or simply black snake〔 — is a nonvenomous species of Colubridae found in central North America. No subspecies are currently recognized.
==Geographic range==
Rat snakes are found from New England south through Florida and west through the eastern half of Texas and Nebraska and north again to southern Wisconsin. The black rat snake is the most widely distributed common rat snake with a range from New England south through Georgia and west across the northern parts of Alabama, Mississippi, and Louisiana, and north through Oklahoma to southern Wisconsin. There is also an isolated population in southern Canada and northern New York.
The yellow rat snake is found along the coast of the Carolinas south through Georgia and Florida. The Everglades rat snake has an isolated population in southern Florida's Everglades. The gray rat snake ranges from southern Georgia and northern Florida west through Mississippi and north to southern Kentucky. The Texas rat snake can be found in southern Oklahoma, Texas, and Louisiana.
Common rat snakes live in a variety of habitats with each subspecies preferring a slightly different one. Some of these habitats overlap with one another. Common rat snakes are excellent climbers and spend a lot of time in trees. Black rat snakes live at elevations from sea level to high altitudes in the Appalachian Mountains. Black rat snakes live in habitats ranging from a rocky hillside to flat farmland.〔(【引用サイトリンク】title=Black Rat Snake )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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