The Collared Redstart (Myioborus torquatus) is a brightly coloured, highly animated warbler of Central American mountains. Like other members of Myioborus, it is often called a "whitestart" rather than a "redstart". The Collared Redstart has dark blue-grey uniform upperparts, with some greenish glossy feathers on lower back and upper rump. The underparts are bright yellow, mostly whitish on vent and undertail-coverts. The roofed nest has a round side entrance and is built on the ground or a steep bank, hidden amongst rocks, tufts of grass or under a fallen log. It is constructed from strips of bark, plant fibres, leaves, and grass. The sexes are similar, but young birds are duller, with a browner back, weakly yellow underparts, and the head entirely slate-coloured, with no yellow on the face or rufous on the crown.