Despite their cute appearance, house sparrows are invasive and can cause more harm than good. Here's what to do to keep them ...

A chipping sparrow perches on a caged bird feeder. This individual is in nonbreeding plumage. Note that it has a rather ...

At that season it is frequently mistaken for the chipping sparrow, but the 2 rarely overlap in winter. The American tree sparrow often occurs in flocks of up to 50 birds. In habitat and behavior ...