Cliff swallows are said by ornithologists to show the highest degree of colonization of any of the 89 swallow species in the world. Colonies can number from 200 to more than 2,000 nests. They could be ...
The annual swallow show is ramping up on Plum Island! Plentiful fruit and insects on the Parker River Refuge attracts tens of thousands of swallows in mid-August, and this birding spectacle is one ...