I found this pretty little bleached bone while walking the dog and slipped it in a coat pocket.
By the time I got home, the bone had broken in half.
I'm assuming because of the hollowness that the bone originally belonged to a bird. A quick look at the Wikipedia bird anatomy articles suggests the bone is part of the wing, the Humerus, as shown in this diagrammatic representation.
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The birds we see at our feeders are mostly sparrows, finches and a few pigeons, and doves. And, lately, some suet has attracted the attention of a Curve-billed Thrasher.
The size of the bone looks about right for a pigeon.
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