Northern Water Snake

A green frog in Berlin, photographed by Sarah Davis.
Sarah Davis photographed a green frog and a northern water snake along the trails from Berlin Meadows.
A northern water snake in Littleton, photographed by Christa Collins.
Christa Collins photographed this northern water snake at Littleton Conservation Trust's Sprong Land.
Courting northern water snakes in Acton, photographed by Kate Tyrrell.
Kate Tyrrell photographed these courting northern water snakes in Acton.