The spring migration of the red sided garter snake.
Thamnophis sirtalis parietalis.

How do they find their way ?  Robert Mason, an American biologist from the University of Oregon who has been studying them for the past 20 years, believes they rely on their sense of smell as well as following the stars.  This enigma has, however, not been fully resolved 

It is the largest concentration of snakes in the world.  Every springtime in Narcisse, in the Canadian province of Manitoba, tens of thousands of them burst out of holes in the rocks where they have been hibernating.   (image by Olivier Blaise)
The spring migration of the red sided garter snake. Thamnophis sirtalis parietalis. How do they find their way ? Robert Mason, an American biologist from the University of Oregon who has been studying them for the past 20 years, believes they rely on their sense of smell as well as following the stars. This enigma has, however, not been fully resolved It is the largest concentration of snakes in the world. Every springtime in Narcisse, in the Canadian province of Manitoba, tens of thousands of them burst out of holes in the rocks where they have been hibernating.
©Olivier Blaise
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