Marie Read / Two Black-capped chickadees (Poecile atricapillus) in mid-air fight by a sunflower, New York, USA, February
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Karine Aigner / Portrait of a Black-capped chickadee, (Poecile atricapillus) with white background, Block island, Rhode Island, USA. Bird caught during scientific research.
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John Cancalosi / Black-capped chickadee (Poecile atricapillus) building nest, New York, USA, April.
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John Cancalosi / Black-capped chickadee (Poecile atricapillus) building nest, New York, USA, April.
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John Cancalosi / Black-capped chickadee (Poecile atricapillus) building nest, New York, USA, April.
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John Cancalosi / Black-capped chickadee (Poecile atricapillus) building nest, New York, USA, April.
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John Cancalosi / Black-capped chickadee (Poecile atricapillus) building nest, New York, USA, April.
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John Cancalosi / Black-capped chickadee (Poecile atricapillus) building nest, New York, USA, April.
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John Cancalosi / Black-capped chickadee (Poecile atricapillus) building nest, New York, USA, April.
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John Cancalosi / Black-capped chickadee (Poecile atricapillus) building nest, New York, USA, April.
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John Cancalosi / Black-capped chickadee (Poecile atricapillus) building nest, New York, USA, April.
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John Cancalosi / Black-capped chickadee (Poecile atricapillus) building nest, New York, USA, April.