Photos | Kathryn Grabenstein

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KATHRYN GRABENSTEIN

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Black-capped chickadee leaving nest box.

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Black-capped chickadee nest made with various man-made materials

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Adult black-capped chickadee

Mountain chickadee nestlings

Mountain Research Station's woodshop

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Newly hatched black-capped chickadees

Our highest nestbox site at the Mountain Research Station; just over 11,000'

Adult black-capped chickadee

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Adult mountain chickadee

Pygmy nuthatch nest

Centaurus High School student watching the clouds roll in at Niwot Ridge

Inside the Mountain Research Station woodshop

Pine Grosbeak

Mounting nest boxes at 8,000'

Leucistic mountain chickadee at the Mountain Research Station

Lab affiliate: Olive

Black-capped chickadees

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