We went for a visit to the Narcisse Snake Dens in early May 2018 to see the red-sided garter snakes known scientifically as Thamnophis sirtalis parietalis.
Two of the five dens were fairly active that day.
The Narcisse Snake Pits are located in the Rural Municipality of Armstrong about 6 kilometres (3.7 mi) north of Narcisse, Manitoba, Canada. The dens are the winter home of tens of thousands of red-sided garter snakes (Thamnophis sirtalis parietalis). These pits are the largest concentration in the world of this particular type of snake. Their winter dens are subterranean caverns formed by the area’s water-worn limestone bedrock. In the spring, they come up from their dens to the snake pits, where they mate. Then they disperse into the nearby marshes for the summer.
Scroll down for a “snake action” video and another picture.
Here is some video of the snakes.
You can also download your own copy of this video at Archive.org in various video formats.
A close-up of one of the dens.