From its start in 1903, the National Wildlife Refuge System has owed its very existence to concerned citizens eager to protect America's natural resources.
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The sidewinder uses a
sidewinding movement to travel across the hot sand with only a small part of
its body touching at one time. Sidewinders use quick motions to wiggle into the
sand and bury themselves, leaving only their nostrils and eyes visible above
the sand. One way to know it is a sidewinder is by the shape of its head -- it