Colima Warbler

The Colima warbler, known scientifically as Leiothlypis crissalis, is a modestly adorned New World warbler. This small bird measures approximately 4.5 to 5 inches in length and is characterized by its predominantly dark gray and brownish plumage. A distinctive feature is the pale underside, complemented by a yellow rump and undertail feathers. A white eye-ring adds a touch of brightness to its visage, while males boast an orange crown patch, a subtle but notable trait.

Identification Tips

When attempting to distinguish the Colima warbler from its avian kin, note its robust build and heavier bill compared to similar species. The male's orange crown patch is a key identifier. In contrast to Virginia's warbler, the Colima warbler's breast is less yellow and more gray, and the yellow coloring around the tail is less vibrant, leaning towards a paler hue.

Habitat

The Colima warbler is a denizen of the mountainous regions, making its home in the Sierra Madre Occidental and Oriental ranges of central Mexico. It is also known to inhabit the Chisos Mountains within Big Bend National Park in Texas.

Distribution

This warbler's range is primarily within central Mexico's mountainous terrain, with a small population extending just over the border into southwestern Texas.

Behaviour

The Colima warbler is a ground-nesting bird, often concealing its nest among rocks in its mountainous habitat. Its behavior during breeding season is characterized by the construction of a loose, cup-shaped nest crafted from grass, leaves, and moss.

Breeding

Breeding Colima warblers lay a clutch of typically four eggs. These eggs are white to cream in color, adorned with brown speckles, and are nestled within the carefully constructed ground nests.

Similar Species

The Virginia's warbler is the species most commonly confused with the Colima warbler. However, the Virginia's warbler is smaller, with more pronounced yellow or pale coloring on the breast and a more vibrant yellow above and below the tail.

Conservation status

The Colima warbler is currently classified as Least Concern by the IUCN, indicating that, at present, there are no immediate threats to its population numbers that would warrant a higher level of concern.