Northern ribbon snake
|Northern ribbon snake|
|Subspecies:||T. s. septentrionalis|
|Thamnophis sauritus septentrionalis
The northern ribbon snake (Thamnophis sauritus septentrionalis) is a subspecies of garter snake. It is one of four subspecies of the ribbon snake (Thamnophis sauritus) and occurs in the United States and Canada in southern Maine, Connecticut, Massachusetts, southern Ontario, Michigan, New York, Nova Scotia, northern Minnesota, Ohio, Illinois, and Indiana. It is listed as a state endangered species in Wisconsin. It is a slender black or brown snake with three bright-yellow or white stripes on its back and sides. The head is black, with the scales alongside the mouth being white. The underside is also white or light yellow, but it is mostly white on juveniles and adults. Adult ribbon snakes are 45–65 cm (18–26 in) in length.
Northern ribbon snakes have from three to 26 young which are born in late summer. The young snakes are 7-9 in long and are colored the same as the adults. As most garter snakes, the mother gives birth to live young (ovoviviparous).
- Northern Ribbon Snake, Natural Resources Canada
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