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9 surprising animals that fly

By: Bryan Nelson on Oct. 22, 2010, 12:48 p.m.
Flying squirrel

Photo: ZUMA Press

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Flying squirrel

As many as 44 species of squirrel have evolved furry membranes that stretch from their wrists to their ankles, allowing them remarkable freedom in gliding through the air.

Their aeronautic design is quite impressive. They are capable of directing their flight with subtle movements from specially adapted wrist bones, and they use their tails  as an air brake.