The story of how winter has shaped life in the Great Lakes. A polar vortex paralyzes fish and ducks and attracts hundreds of bald eagles. Wolves hunt deer trapped by ice, but are manipulated by ravens. See how animals use snow to survive.

The spring thaw in the Great Lakes creates ice tsunamis. Photosynthetic salamanders, fishing wolves, deep-diving moose, baby rattlesnakes and colourful fish hunting mid-air all show us unique adaptations to spring.