Both beak shape and body mass are also important. In general, smaller birds generate higher frequency sounds, with larger ...

So I did the Christmas bird count on Sunday in Glacier National Park, where I walked about 12 miles to see a chickadee. I at least could have seen a creeper. Creepers are pretty common the woods I ...

A common raven, for example, is a CORA, while a black-capped chickadee is a BCCH. It’s not as simple as it sounds, however.