Question

mirgrating birds fly across the evening sky in a ​

Answer 1

Answer:

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Anyone watching the autumn sky knows that migrating birds fly in a V formation, but scientists have long debated why. A new study of ibises finds that these big-winged birds carefully position their wingtips and sync their flapping, presumably to catch the preceding bird's updraft—and save energy during flight.

Answer 2

Answer:

V or J formation

Explanation:

it reduces the energy required for flying