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The Great
Basin gopher snake, also known as the bullsnake, is a friend
to agriculture, as it primarily eats gophers and other rodents.
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During a recent elementary school outing at
the Durango Nature Center, I heard shrieks of “Snake! Snake!” from
a group of nearby students. I could tell from the tone in the kids’ voices
that no one had accidentally tripped over a rattlesnake, but the thrill
in those cries indicated something beyond a typical garter snake sighting.
Sure enough, the kids had spotted one of the Nature Center’s most
charismatic denizens, Pituophis catenifer deserticola, the Great Basin Gopher
Snake, also known locally as a bullsnake.
Gopher snakes are large, heavy-bodied snakes measuring
36” to 100” in length, colored soft yellow with large brown-black
blotches running from head to tail- a color scheme reminiscent of ripe bananas.
When alarmed, the gopher snake will imitate the (smaller and drabber) rattlesnake
by coiling, rattling its tail in dry vegetation, flaring its narrow head
into a triangular shape, and striking. Typically, gopher snakes tend to
exhibit behavior that is more docile. The Nature Center gopher snakes calmly
slide past dozens of chattering children at a time, hiding in a nearby gopher
hole when the attention becomes intolerable.
Gopher snakes, true to their name, feed primarily upon
gophers and other rodents (making them excellent agricultural allies during
this wet spring of high rodent population). These snakes are non-venemous
constrictors that suffocate their prey. Prey caught above ground is wrapped
in the snake’s coils; prey caught in underground burrows is pressed
against the burrow wall. Gopher snakes will also hunt lizards, and even
raid birds nests, for these snakes are quite agile, able to climb trees
as well as dig into gopher mounds. To dispel a myth however, gopher snakes
do not prey upon rattlesnakes. The two snakes compete for the same food
sources, and therefore a healthy gopher snake population may prevent rattlesnakes
from migrating into an area.
Gopher snakes mate in April-May, as witnessed by
a group of preschoolers and their moms visiting the Nature Center a few
years ago. One mommy had nearly trodden upon a gopher snake (admirably
stifling her reflexive scream), and we had moved all of the kids to a
better vantage point to enjoy the snake without frightening it away. Moments
later, another gopher snake appeared, and the two began coiling around
each other, entwined in an impressive courtship display. As the snakes
bumped snouts one little girl shouted “They’re kissing!”.
Mercifully, I was spared the need to explain any further, and just confirmed
that yes, that’s just what Mr. and Mrs. Snake were doing. Regarding
the rest of the story: after mating, Mrs. Gopher Snake lays an average
of 12 eggs, which incubate (unsupported by a parent) roughly 75 days.
The gray, foot-long hatchlings emerge in August-September. Come late September,
the snakes head for “hibernacula,” communal hibernation dens
below the frost line. The snakes emerge in April, and the cycle begins
again.
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