Small, inconspicuous hummingbird of humid tropical lowlands. Favors shady forest understory and edges, where feeds at all levels. Males sit and sing tirelessly from knee-high perches in the understory but, they can be very difficult to locate. Note the tiny size, striped face, arched bill, buffy underparts, and rusty rump patch. Squeak call in flight similar to Long-billed Hermit but softer and less explosive.