NESTING ALONG STREAMBANKS IN WOODS
Four kinds of small birds, including Louisiana waterthrushes, rough-winged swallows, Acadian flycatchers and eastern phoebes, have characteristics in common because of the nesting habitat they share along streams in eastern North America woodlands. That habitat molded them to be as they are. These small birds are brownish or grayish, which camouflages them along streambanks in shaded woods. Two kinds utter loud songs to be heard above the musically-tumbling stream. They all consume the abundant invertebrates that live along clear, flowing waterways, and feed those critters to their young birds in their nests. But they catch those critters in different ways, which reduces competition for food among them, and helps make them be distinct species. Waterthrushes seek invertebrates under stones along stream shallows and their gravelly edges. They even flip some stones over to look for invert...