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Gray ratsnake
:''Gray's rat snake is a name of another snake, Coluber ventromaculatus''.
The gray ratsnake or gray rat snake (''Pantherophis spiloides''),〔(''Pantherophis'' Fitzinger, 1843—NORTH AMERICAN RATSNAKES" ). in ''Scientific and Standard English Names of Amphibians and Reptiles of North America North of Mexico, With Comments Regarding Confidence In Our Understanding''. Edition 6.1 Last updated: 24 May 2011.〕 also known as the midlands ratsnake or chicken snake, is a member of the genus ''Pantherophis'' in the subfamily Colubrinae. Within the genus ''Pantherophis'', which includes ratsnakes, corn snakes, and fox snakes, the gray ratsnake is one of ten species.
==Description==
A medium to large serpent, gray rat snakes typically reach an adult size of ; however, the record is . Unlike other ''Pantherophis'', whose conspicuous juvenile pattern fades into adulthood, gray ratsnakes do not undergo drastic ontogenetic changes in color or markings. These snakes retain the juvenile pattern of dark elongate dorsal blotches separated by four, or more, pale gray body scales, a light gray crown with dark striping that forms an anteriorly facing spearpoint, and a solid band which covers the eyes and extends rearward to the posterior upper labial scales. The venter is usually off-white or pale gray with darker irregular blotches, and a double row of black spots behind the divided anal plate of the vent. The dorsal scale rows around midbody are usually weakly keeled. Because the gray ratsnake shares its range with other members of its genus, hybrids of midlands x eastern ratsnakes are not uncommon.
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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