Golden-crowned Warbler

The golden-crowned warbler is 12.0–13.5 cm (4.7–5.3 in) in overall length. It has grey-green upperparts and bright yellow underparts. The head is grey with a black-bordered yellow crown stripe, a yellow or white supercilium and a black eyestripe. Sexes are similar, but the immature golden-crowned warbler is duller, browner and lacks the head pattern other than the eyestripe. The subspecies fall into four groups. The Central American culicivorus group (known as the stripe-crowned warbler) is essentially as the nominate described above, the southwestern cabanisi group (known as Cabanis's warbler) has grey upperparts and a white supercilium, the aureocapillus group (known as the golden-crowned warbler) of the southeast, has a white supercilium and orange-rufous crown stripe, and the single subspecies in the hypoleucus group (known as the white-bellied warbler) with white, not yellow, underparts that occurs in south central Brazil.

It breeds from Mexico and south through Central America to northeastern Argentina and Uruguay, and on Trinidad. It is mainly a species of lowland forests.

The golden-crowned warbler feeds on arthropods, especially insects and spiders. Their song is a high thin pit-seet-seet-seet-seet, and the call is a sharp tsip. It lays two to four rufous-spotted white eggs in a domed nest in a bank or under leaves on the forest floor. The eggs are incubated by the female for 10 to 12 days. Parent birds will feign injury to distract potential nest predators.