Rufous-crowned Sparrow

Overview

The rufous-crowned sparrow (Aimophila ruficeps) is a small passerine bird belonging to the family of American sparrows. It is a non-migratory species primarily found in the Southwestern United States and much of the interior of Mexico, where it thrives in arid scrubland environments.

Identification

• A smallish bird approximately 5.25 inches (13.3 cm) long with a brown, streaked back and gray underparts.
• Distinctive rufous to chestnut crown, often featuring a gray streak running through the centre.
• Face and supercilium are gray, marked by a brown or rufous streak extending from each eye and a thick black malar streak.
• Song consists of a short, fast, bubbling series of chip notes that can accelerate near the end, accompanied by calls such as a nasal chur or a thin tsi.

Habitat

Found in open oak woodlands, dry uplands with grassy vegetation and bushes, coastal scrublands, and chaparral areas, often near rocky outcroppings. Its range spans from the southwestern United States down through Mexico to southern Puebla and Oaxaca, typically between 3,000 and 6,000 feet in elevation. The distribution is patchy and discontinuous, consisting of many small, isolated populations.

Diet

Feeds primarily on small grass and forb seeds, fresh grass stems, and tender plant shoots in autumn and winter, while consuming a greater quantity and variety of insects in spring and summer. Forages slowly on or near the ground by walking or hopping under shrubs and dense grasses, usually pecking or scratching at leaf litter.

Did you know?

The species is occasionally referred to colloquially as the rock sparrow due to its preference for rocky slopes. It employs three distinct displays to distract predators from its nest, including a 'rodent run', a 'broken wing' imitation, and 'tumbling off the bush'.