The minimum number of american bird species known to have precise migration instincts is:

a: 10+
b: 100+
c: 1000+
d: 10,000+

B: 100+ Over 100 American birds are known to have precise migration instincts

B: 100+

Explanation:

A common pattern of North American bird migration is developed was the bird flying north teds to be further west and those that migrate in south teds to migrate an eastwards direction.  Their navigation is based on a variety of sense and sun directions, some have the ability to detect magnetic fields ad others have instinct.  The species like the vireos, the flycatchers, the ruby-throat hummingbirds, along the ducks, the geese, swans, and tanagers, also the Arctic Terns and the swallows are migratory species of Americas.

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