Chestnut-backed Chickadee

cbchickadee2

The chickadees are starting to excavate their nest cavities. This Chestnut-backed Chickadee was working on a dead snag right along the trail at Nestucca Bay NWR. Even though the birds choose soft dead wood on which to work, it seems a herculean task for a bird with such a diminutive bill to excavate a cavity large enough for nesting.

cbchickadee-in-cavity

She can fit about half her body into the cavity so far. It takes about seven days to complete a nest.

cbchickadee-with-chips

Here she spits out a mouthful of wood chips. Larger chips are carried away from the nest site before being dropped. A big pile of wood chips at the base of the nest tree would alert predators to the location of the nest.

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Posted on April 7, 2009, in nesting and tagged . Bookmark the permalink. 2 Comments.

  1. I got to see a pair of Black-capped Chickadees working on a nest excavation a few weeks ago. Do they stay with that nest hole for the season or could they change their minds?

    • rakestrawbirder

      Given the amount of effort required to excavate a cavity, I imagine that the pair would stick with it, but I don’t have any hard data.

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