A small, brightly-colored bird of foothill and lower montane forest canopy. Bright yellow underparts, face and forehead. Gray back and crown, bordered with black which widens at the back of the neck to form a half-collar. Obvious white spots on some wing feather tips, meeting in 2 lines down the back. Unmistakable appearance. Explosive whistlerlike “whip!” notes or repeated “chikki-chewitt!”.