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    • Matthew Herron says

      Thanks; I know there are western bluebirds in Yellowstone, too, and I’m not confident enough in my bird IDs to be sure I can differentiate.

  1. quotetheunquote says

    Yes, lovely, a Mountain Bluebird indeed!

    Aside from the lack of any “brick red” in underparts, the tone (or is it “chroma?”) is quite different between the two species; the Mountain’s blue is a light, clear, cerulean, while the Western’s is very deep, saturated.

    “the”

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