Northwestern Oklahoma and throughout the panhandle. The plains
garter snake is a rather plain garter snake with two rows of squared
spots on either side of the yellow dorsal stripe. Although many
species of garters look very similar, the squared spots between
the dorsal and lateral stripes (on scale rows 3 and 4) are a characteristic
shared by only one other species of garter, the checkered garter
snake, Thamnophis marcianus, which is shares much of the
same range except Cimarron County, but has the lateral light line
on scale rows 2 and 3.
Diet ranges from earthworms, crayfish, and insects, to tadpoles,
frogs, and fish. Large specimens may take young rodents or birds
as the opportunity arises.