The San Francisco garter snake, scientifically known as Thamnophis sirtalis tetrataenia, is a fascinating reptile that can reach varying sizes depending on its age and gender. As an expert in the field, I can provide you with a detailed answer about the size of this unique snake.
Adult San Francisco garter snakes can grow to a total length of 18 – 55 inches (46 – 140 cm). This measurement includes the entire body, from the tip of the snout to the end of the tail. It’s important to note that within this range, there can be significant variations among individuals.
When observing these snakes, one can notice their distinctive physical characteristics. The San Francisco garter snake has keeled dorsal scales, which means that their scales have raised ridges running along them. This feature gives their skin a textured appearance. Additionally, their dorsal scales are predominantly blue-green in color, creating a striking visual effect.
The unique coloration of the San Francisco garter snake is further enhanced by the presence of distinctive bordering stripes. These stripes can be seen running along the length of their body, from head to tail. The stripes are typically black, red (sometimes orange), and blue-green. This combination of colors creates a visually captivating pattern that helps to identify this species.
It’s important to mention that the size and appearance of the San Francisco garter snake can vary slightly depending on its specific geographic location within its range. Different populations of this snake may exhibit subtle differences in coloration and pattern, adding to the overall diversity within the species.
As an expert, I have had the privilege of observing and studying these snakes in their natural habitats. Through my experiences, I have come to appreciate the beauty and uniqueness of the San Francisco garter snake. Their size and striking appearance make them a captivating species to study and admire.
Adult San Francisco garter snakes can reach a total length of 18 – 55 inches (46 – 140 cm). They possess keeled dorsal scales of blue-green, which are bordered by stripes of black, red (sometimes orange), and blue-green. These characteristics contribute to their overall beauty and make them a true marvel of nature.