A tree swallow peers at the sky for prey and predator.

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A tree swallow peers at the sky for prey and predator.

Fake owls frightened together by real ducks.

Fake owls frightened together by real ducks.

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A red-winged blackbird tries to eat and sing at the same time.

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This yellow-headed blackbird found something for lunch.

A Great Horned Owl nest in April.

A Great Horned Owl nest in April.

Whooping Crane at the International Crane Foundation in Baraboo, Wisconsin.

Whooping Crane at the International Crane Foundation in Baraboo, Wisconsin.

This house wren just dropped a nesting-material stick.

This house wren just dropped a nesting-material stick.

Tree Swallows will use large feathers in their nests.

Tree Swallows will use large feathers in their nests.

A thirsty deer.

A thirsty deer.