Some catch their prey while in flight; others sit and wait for prey to come near. They’re a group of birds known as aerial insectivores, and they’re in trouble. In the northeast region, this diverse group consists of 19 species that, as their name implies, feed almost exclusively on flying insects. Some, such as the barn swallow and eastern phoebe, are quite common and well-known, while others, such as the olive-sided flycatcher and eastern wood-pewee, are relatively unknown to non-birders.
Unfortunately, as a group, aerial insectivores have been declining steadily across northeastern North America for the last 25 years or so. Flycatchers, swallows, and nightjars (the whip-poor-will and common nighthawk) have been particularly affected. » Continue Reading.