### Identification The Acadian Flycatcher (*Empidonax virescens*) is the most vibrant member of its notoriously difficult genus. While other *Empids* are drab, the Acadian lives up to its name—*virescens* meaning "greenish"—with a rich olive-green back and a soft yellowish wash on the flanks. Look for two bold, buffy-white wing bars and a prominent, slightly teardrop-shaped white eye-ring. To distinguish it from the similar Least Flycatcher, look at the wings: the Acadian has exceptionally long primary projections (wingtips), giving it a sleeker, more tapered silhouette. Its bill is also a standout—broad, long, and featuring a completely pale, flesh-pink lower mandible.
### Habitat & Range In the summer, these birds are the "ghosts" of the deep, humid woods. They are specialists of mature deciduous forests across the Eastern U.S., particularly shady ravines, bottomland swamps, and areas near running water. They prefer a closed canopy with an open understory, often perching in the mid-story of beech or maple trees. Come autumn, they migrate to the lush tropical forests of Central and South America.
### Behaviour & Diet The Acadian is a classic "aerial sallyist." It sits motionless on a shaded branch, scanning for movement before lunging out with an audible *snap* of the bill to snatch a flying insect—wasps, beetles, or moths—out of mid-air. Unlike the nervous tail-flicking of other flycatchers, the Acadian is more stoic, though it may give a quick tail-quiver upon landing. Its presence is most often revealed by its explosive, two-syllable song: a sharp, sneezing *peet-sa!* that rings through the forest gallery.
### Fascinating Fact The Acadian Flycatcher is a master of "messy" camouflage. Their nests are flimsy, hammock-like cups suspended by the rims from the tips of horizontal branches, often dangling directly over water. To a predator, the nest looks exactly like a random clump of dead leaves and forest debris caught in a fork of a twig—a brilliant bit of architectural deception.