A small flycatcher-like bird with a bold dark eye on a plain face, a pale eye-ring, olive-green upperparts, and solid yellow underparts. Singles or pairs sit upright within understory of forest, woodland, and plantations in lowlands and mountains, often attending mixed-species flocks. Separated from Gray-headed Canary-Flycatcher by yellow chin and lack of gray head and breast. Told from Yellow-bellied Whistler by eye-ring, absence of white throat, and slimmer bill. Gives a simple high-pitched whistled song that rises and falls: “swit-soo-swit-soo.” Also gives a short, squelching “ti-rip” trill.