ノドジロヒゲオカマドドリ Margarornis bellulus

Rare but unique within a tiny range near the border of Panama and Colombia. Small brown bird that hitches along mossy limbs in humid cloud forest. Look for a buffy eyebrow, a white throat, and pale spotting on the underparts. Sexes alike. Similar to Pearled Treerunner but no range overlap; also note duller brown (not rufous) upperparts. Typically seen singly or in pairs, often following a mixed-species flock.