American Tree Sparrow, Spizella arboreus


American Tree Sparrow, 12/6/10, Radio Road, Redwood Shores, San Mateo Co
This American Tree Sparrow spent a couple of December days sporadically foraging in a closed area while local birders watched and took pictures from behind a fence. Tree Sparrows nest in the Arctic, and winter across most of the northern US, but are considerable rarities in most of California.


American Tree Sparrow, 12/6/10, Radio Road, Redwood Shores, San Mateo Co
This picture shows the "stick-pin" or dark spot in the center of the breast, which is one of the distinctive
marks of this species, along with the rufous crown and eyeline, and the bicolored bill.


American Tree Sparrow, 12/6/10, Radio Road, Redwood Shores, San Mateo Co