While kayaking in Lake Superior, I observed a red squirrel (Tamiasciurus hudsonicus) swimming. I followed the squirrel for approximately 1.5 km until it safely arrived on an island, which is approximately 2 km from the shores of mainland Wisconsin. This is the first published observation of a red squirrel swimming in one of the Great Lakes, as well as the longest documented swim of a red squirrel. Further investigations are needed to determine whether swimming is a significant form of dispersal and island colonization for red squirrels in North America.
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1 June 2005
Evidence for Long-distance Swimming Capabilities in Red Squirrels, Tamiasciurus hudsonicus
Jonathan N. Pauli
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