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The keen eyesight and acute hearing of
birds help them react quickly to predators, which
may be other birds, such as falcons and hawks,
or other types of animals, such as snakes and
weasels. Many small birds feed in flocks, where
they can benefit from the observing power of numerous
pairs of eyes. The first bird in a flock to spot
a predator usually warns the others with an alarm
call.
Birds that feed alone commonly
rely on camouflage and rapid flight as means of
evading predators. Many birds have highly specific
and unusual defense strategies. The burrowing
owl in North America, which lives in the burrows
of ground squirrels, frightens off predators by
making a call that sounds much like a rattlesnake.
The snipe, a wading bird, flees from its enemies
with a zigzag flight pattern that is hard for
other birds to follow.
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