Pheucticus melanocephalus. Black-headed Grosbeak
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From the Collection
"Laurel [Umbellularia californica] . . . Hot Springs, Napa -June 1859" --Two adults with two young on a branch; female offers one of the young an insect.
Collective title: Watercolors of birds on the Pacific slope
More details about the album and its contents can be found on the collection website.
From the Watercolour World