Why Are Bluebirds Blue?

It's a trick of the light!

Nature News: Bluebirds aren't blue, but use structural coloration

Get Wild: Our magnificent mountain bluebirds

Bluebird Meaning: Do Bluebirds Symbolize Happiness? - Birds and Blooms

Bluebird Stock Photo - Download Image Now - Bluebird - Bird, Eastern Bluebird, Springtime - iStock

bluebird boxes: be a good landlord - A Way To Garden

Not all blue birds are bluebirds: Learn the difference between our blue-hued birds

Top 9 Blue Birds in Connecticut (With Pictures)

Why are bluebirds blue? - Quora

Arctic Seabirds as Sentinels of Change - Nature Alberta

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eastern bluebird

Mountain bluebird spotted in Wrightsville Beach a long way from home

Blue feathers