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["Paul Cory" <paulcory AT gmail.com>]

> The high angle bone, long tendons, and claws scream "bird" while the
> crunchiness, texture and feel all screamed "crustacean".  Deep down I think
> it has to be a bird of some kind, but what kind I do no know.
>
> Any thoughts?
>

Looks like the foot of a wading bird, probably one of the species you
see darting in and out of the water along the beach.