The American tree sparrow often occurs in flocks of up to 50 birds. In habitat and behavior, they are much like field sparrows, but American tree sparrows are more frequent at bird feeders.

Courtesy of Cornell Laboratory of OrthnithologyIDENTIFY the American tree sparrow by the following marks: a brownish-red crown and a dark spot on the breast; a bill that is dark above and ...

Winter in the Rockies reduces the number and diversity of birds. We do get an influx of four junco subspecies: pink-sided, Oregon, slate-colored and white-winged. They winter in our area, ...