Tiny warbler with an extremely long, strongly-patterned tail. Note blackish wing coverts with white tips, gray on the back of the neck, and a warm brown back. Males have a dark crown over a pale eyebrow. Roves in small family groups in open acacia savanna, foraging in bushes and often on the ground while continuously moving tail. Song a rapid, insectlike high-pitched repeating whistle. Contact call a high-pitched repeating note "pi, pi, pi…"