All three of the patchnose snakes found in the range of this work are fairly slender snakes. They tend to be crepuscular during the hottest months and can be found basking at mid-day during the cooler months.
TEXAS PATCHNOSE SNAKE
They are fast moving snakes.
Their primary food seems to be lizards, but small snakes, reptile eggs and rodents are sometimes taken.
Salvadora grahamiae lineata
The texas patchnose snake ranges in approximately the central portion of the state from far south Texas nearly to the Red River on the north. In the range of this work it is found in Val Verde county. To the west, in Terrell County is a zone of intergradation with the mountain patchnose, S. g. grahamiae
Like all patchnose, it is a diurnal, fast moving snake. Although they are common throughout most of their range, they are seldom seen due to their speed
This specimen is from Hwy. 277 in norteastern Val Verde County. It was found in early November, basking on the shoulder of the road.
Notice the large rostral plate which gives the snake its name.
MOUNTAIN PATCHNOSE SNAKE
Salvadora grahamiae grahamiae
The mountain patchnose is found through the Big bend region to far western Texas. In the range of this work it is found in Culberson, Presidio, Jeff Davis and Brewster counties. In Terrell County it intergrades with the Texas patchnose.
Unlike the other patchnose in this region, it does not have stripes on the sides.
It is slightly smaller than the Texas patchnose, usually 20-30 inches. It is not uncommonly seen crossing roads in the morning and late afternoon.
BIG BEND PATCHNOSE SNAKE
The Big Bend patchnose is found through the Big bend region to far western Texas roughly following the course of the Rio Grande River.. In the range of this work it is found in Presidio, Jeff Davis and Brewster counties and possibly in Culberson County.
It is a thin snake which attains lengths of up to 45 inches..