During the breeding season, when Eastern Screech-Owls capture the worm-like reptiles known as blind snakes, they deliver them to their chicks alive and wriggling. Some are gulped down immediately, but others escape by burrowing beneath the nest. The surviving “snakes” feed on the insect larvae they find in the nest — larvae that would otherwise parasitize the owl nestlings. A study conducted by Baylor University scientists found that screech-owl chicks grew faster and healthier in nests kept vermin-free by the blind snakes.

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