There are 35 recognized species and subspecies of garter snake.
Garter snakes have complex systems of pheromonal communication. They find other snakes by following their pheromone-scented trails. Male garter snakes sometimes produce both male and female pheromones. During the mating season, this ability fools other males into attempting to mate with them. This causes the transfer of heat to them in kleptothermy, which is an advantage immediately after hibernation, allowing them to become more active. Male snakes giving off both male and female pheromones have been shown to garner more copulations than normal males in the mating balls that form at the den when females enter the mating melee. A snake hatch can include as many as 57 young.
Garter snakes are present throughout most of North America. Their wide distribution is due to their varied diets and adaptability to different habitats, with varying proximity to water. However, in the western part of North America these snakes are more aquatic than in the eastern portion. Garter snakes live in a variety of habitats, including forests, woodlands, fields, grasslands and lawns, but never far from water, often an adjacent wetland, stream or pond.
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Main image by By Oregon State University - https://www.flickr.com/photos/oregonstateuniversity/6848773253/, CC BY-SA 2.0, https://commons.wikimedia.org/w/index.php?curid=47806139
Additional image by Connor Long - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=42625007