Why Some Birds of Prey Become Transvestites

Birds of prey may be thought of as fierce foes, but scientists find that some males disguise themselves as peaceful females.

These males belong to a species of raptor known as the marsh harrier. Using plastic decoys, French researchers learned that the transvestites among these predators are less aggressive than other males.
Some animals will use the tactic known as sexual mimicry in the cutthroat battle to survive. For instance, young male birds often have female plumage that helps camouflage them; they will acquire more striking plumage only after reaching sexual maturity, to help them attract mates.

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