Life stirring under ice

While it may seem frozen and silent on land, much life goes on below the ice, with many fishes and the larvae of dragonflies, midges, blackflies, deer flies and craneflies swimming or wriggling about, albeit sluggishly in some cases. Later in summer, if you’re lucky, you can watch dragonfly larvae haul themselves out from the mucky deep onto sun-warmed rock faces. There they will dry out, shed their old skins, sprout wings and fly away in a thrilling metamorphosis.

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