One of the first imperiled animals the Center championed, the southwestern willow flycatcher has suffered more than a century of steady decline. Livestock grazing, dams, water withdrawal, and sprawl ...

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.

39 x 49.5 cm. (15.4 x 19.5 in.) ...

This bird, a juvenile Sharp-shinned Hawk, sat in peaceful repose, seemingly oblivious to the intense scoldings of the ...

One of the first imperiled animals the Center championed, the southwestern willow flycatcher has suffered more than a century of steady decline. Livestock grazing, dams, water withdrawal, and sprawl ...