Tree Swallow - Tachycineta bicolor

Length 5.0-5.8 in (12.7-14.6 cm)
Weight 0.6-0.9 oz (17-25.5 g)
Clutch Size 2-8
Chicks at birth Altricial
IUCN Conservation Status Least Concern

The Tree Swallow breeds in North America including the S.F. Bay Area. They winter in Mexico, Central America and the Caribbean.

The best place I know to see them is Coyote Hills Park in Fremont, CA. They have set up nesting boxes along some of the paths which the swallows use. They primarily eat insects.

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