The Cassin’s Sparrow (Peucaea cassinii) is a small songbird native to the southwestern United States and northern Mexico. This species typically measures around 5.5 to 6 inches in length, with a wingspan averaging about 7.5 inches. In terms of weight, these sparrows generally weigh between 0.4 to 0.6 ounces.

Distinguishing field marks of the Cassin’s Sparrow include a plain buffy face with a white eye ring, a streaked back with brown and black markings, and a distinct white patch on the throat. Their underparts are typically pale with faint streaking. The tail is relatively long and rounded. In flight, their wings show thin white bars, and their outer tail feathers display white edges.

During migration, Cassin’s Sparrows exhibit somewhat varied patterns. Some individuals may migrate short distances, while others may undertake longer journeys. Generally, these sparrows breed in the southwestern United States and northern Mexico during the warmer months, then migrate southward to Mexico for the winter. Migration timing can vary depending on factors such as weather conditions and food availability.

Cassin’s Sparrows prefer open grasslands, brushy areas, and scrubby habitats such as desert washes and chaparral. They are often found foraging on the ground for seeds and insects, using their strong bills to crack open seeds and their nimble feet to search for insects among the vegetation. Their subtle coloration and tendency to stay low in dense vegetation can make them challenging to spot despite their distinctive markings.

Overall, the Cassin’s Sparrow is a fascinating species with its unique appearance and migratory behavior. As with many migratory birds, conservation efforts are crucial to ensure the preservation of their habitats throughout their range, especially given the increasing pressures from habitat loss and climate change.