(Summary below adapted from text by from Don Roberson) Summary 5 The San Francisco garter snake (Thamnophis sirtalis tetrataenia) is a slender multi-colored subspecies of the common garter snake.Designated as an endangered subspecies since the year 1967, it is endemic to San Mateo County and the extreme northern part of coastal Santa Cruz County in … I was excited to meet him and hopefully see, firsthand, one of the most endangered species on the continent. Yet this snake has very few to no natural predators, because of it's ability to swim, or slither, away to cover.
Peninsula Open Space Trust is a nonprofit, tax-exempt 501(c)(3) charitable organization. The San Francisco garter snake (Thamnophis sirtalis tetrataenia) has been dubbed “the most beautiful serpent in North America,” and it’s Valley Habitat Agency, the Authority and POST Protect 1,861-Acre Tilton Ranch. And the ratio between males and females was also consistent with a healthy population. DESCRIPTION: The San Francisco garter snake is a slender, three-foot-long snake with an orange head, a greenish-yellow back bordered by red and black stripes, and a bright greenish-blue or turquoise belly. Snakes move in pursuit of amphibian prey dispersing from wetlands. THREATS: The San Francisco garter snake is threatened by urban development, wetland habitat loss, fragmentation of habitat by development and roads, agricultural development, dredging of waterways, disturbance by recreational activities, pesticides, poaching, overgrazing, and nonnative bullfrogs. "Earth's Endangered Creatures - San Francisco Garter Snake Facts" (Online) - Licensed article from … San Francisco garter snakes retreat to uplands and are dormant for much of the winter. But, even thought the San Francisco Garter Snake is well adapted to its environment with little natural predators and many hiding places, invasive species pose a major threat. The U.S. FAMILY: Colubridae. Another major issue in the decreasing of the San Francisco Garter Snake is that it is constantly losing habitat space due to urban development. But we’re not done fighting for their survival. More to come soon. Collection of these endangered animals by private citizens remains illegal. Copyright © 2020 Peninsula Open Space Trust. I left that evening with a sense of peace, knowing that the beautiful snake we found was out there somewhere and that Patrick and his colleagues would be there to look after it. So we were excited to see what Patrick and his team had learned about the health of this snake’s population and see if our efforts had delivered any success. These historical threats to the species remain, but there are now additional threats, such as the documented decline of the California red-legged frog (an essential prey species) and the introduction of bullfrogs into San Francisco garter snake habitat. The San Francisco Garter Snake is bright red, black, white and blue, so it naturally stands out from it's environment, making it an easy prey for predators.
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