This warbler is restricted to Puerto Rico's mountain forests. Adults are black and white above and white with black streaks below, and they glean insects from leaves and branches.
Adults are predominantly black above with white areas, and white below with black streaks. They have white patches around the ears and neck, an incomplete white eye-ring, and white spots on the outer tail feathers.
It gleans insects from leaves and branches in moist montane forest. The U.S. critical-habitat rule also identifies short high-elevation dwarf forest and montane forest with grasses and ferns in the understory as important habitat features.
An extinction-risk assessment has not been added yet.