KATHRYN GRABENSTEIN

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    Black-capped chickadee nestling getting weighed on Day 16
    Black-capped chickadee nest made with various human materials
    Late snow on May 14th in North Boulder
    Boulder Chickadee Study nestbox
    Mountain chickadee nestlings
    Day 16 mountain chickadee nestling
    Mountain Research Station's woodshop
    Adult black-capped chickadee
    Newly hatched black-capped chickadees
    Our highest nestbox site at the Mountain Research Station; just over 11,000'
    Adult black-capped chickadee
    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
    Katherine F. photographing chickadees for her Honors Thesis
    Out of gallery