Tamaulipas Crow

Overview

The Tamaulipas Crow is a small corvid native to northeastern Mexico, with a limited presence in the extreme southern tip of Texas. It is among the smallest crow species found in North America.

Its range is comparatively restricted, and it is closely associated with human-modified landscapes such as farmland, dumps, and towns.

Feather Identification

Feathers are uniformly glossy black with a blue-green sheen, similar in basic pattern to other small crows but noticeably compact given the bird's small size.

• Flight feathers: Short, compact primaries and secondaries reflecting the species' small overall size.
• Tail feathers: Squared, glossy black tail feathers, shorter than in larger crow species.
• Similar species: Very similar to the closely related Sinaloa Crow of western Mexico; overall small size compared to American Crow is a useful clue in areas of range overlap in south Texas.

Plumage Notes

Adults show uniform glossy black plumage with a moderate sheen. Juveniles are duller, gaining full gloss as they mature.

Sexes are alike in plumage. An annual complete molt follows breeding.

Habitat & Range

Tamaulipas Crows favor open scrub, farmland, and towns in northeastern Mexico, with a small population reaching extreme southern Texas, particularly around Brownsville. They are closely tied to human-altered landscapes including refuse areas.

The species is generally resident, without significant long-distance migration.

Behavior & Field Notes

This crow is highly social, often seen in flocks, especially around towns, farmland, and waste disposal sites where food is concentrated. Diet is broad and opportunistic.

Nests are stick platforms built in trees or shrubs. Calls are notably different from typical crow caws, often described as a low, froglike or croaking sound. This unusual voice is one of the most useful field marks for separating it from the larger American Crow where ranges overlap.