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.

The cheery and sociable house sparrow is more closely associated with ... On freshly molted (nonbreeding) bird, the blackish and reddish regions obscured by gray feather tips.

A captive breeding program for the endangered Cape Sable seaside sparrow could increase the number of wild birds and help ...

As many said at the time, bird song did sound different during lockdown, according to a scientific study. By analysing the calls of sparrows recorded over decades, scientists confirmed a change in ...