Active, often noisy warbler found at lower to middle levels of montane cloud forest. Note the olive upperparts and dark and pale pattern on head. Underpart color and extent of cheek patch vary through its range. Dark stripes on head usually contrast with back, and eyebrow is white, not yellow – these two features help to separate it from other similar warblers in range. Usually seen in pairs or family groups. Typical song begins as a rising trill and then morphs into chaotic chattering.