Crescent-chested Warbler

The Crescent-chested Warbler, Oreothlypis superciliosa, presents a charming display of colors with its yellow underparts, a gray head, and a greenish back. A distinctive feature is the bold white eyebrow that sets it apart from its relatives. The adult males are adorned with a discrete chestnut crescent on their breast, a feature that may be less pronounced or absent in females and younger birds.

Identification Tips

To identify this small New World warbler, look for the striking white eyebrow and the chestnut crescent on the breast of the males. The combination of yellow underparts with a gray head and greenish back also aids in distinguishing it from similar species.

Habitat

The Crescent-chested Warbler shows a particular affinity for oak-dominated forests, thriving in these montane environments.

Distribution

This species is commonly found throughout its range, which extends from northern Mexico to northern Nicaragua. It is also known to be an occasional vagrant to Texas.

Behaviour

Outside the breeding season, these monogamous and solitary warblers become more sociable, often joining mixed-species flocks. Their agility is notable as they jump from twigs and foliage, actively foraging for food.

Diet and Feeding

The diet of the Crescent-chested Warbler primarily consists of insects, although they do occasionally consume fruits and berries. They exhibit an acrobatic feeding style, picking food from the underside of leaves and even hanging beneath them, reminiscent of chickadees, to inspect surfaces for prey.

Breeding

These warblers construct their nests atop grassy tussocks or in sheltered locations near the ground, such as by a hill or bank. Typically, they will raise 1 to 2 broods per year. The female undertakes the task of building the nest, using moss, grass, and conifer needles, and lining it with finer materials. She lays about three plain white eggs, which she incubates for an estimated 12 to 14 days. The altricial chicks are brooded by the female and fed by both parents, staying in the nest for approximately 8 to 10 days.

Conservation status

The Crescent-chested Warbler is currently classified as Least Concern by the IUCN, indicating that it is not at immediate risk of widespread decline.