Hummingbirds are incredible creatures that are always on the move. But do hummingbirds sleep? Can a hummingbird fly up to 4,000 miles? Check out this episode of Sky Stories to find out! Stories originally written by Greg Martin for Liberty Wildlife's Nature News. Stories narrated by Nathan Thrash. Rufus hummingbird calls are from the Cornell Lab of Orthnithogy's All About Birds Website. 

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