Cassin's Finch

The Cassin's finch, a member of the finch family Fringillidae, is a small bird with a length of approximately 6.3 inches (16 cm), a wingspan ranging from 9.8 to 10.6 inches (25-27 cm), and a weight between 0.8 to 1.2 ounces (24-34 g). The adult males are particularly striking with their raspberry red plumage adorning the head, breast, back, and rump, while their back and undertail are streaked. The females, on the other hand, are clad in light brown with brown streaks across their upper and underparts, and their facial markings are somewhat muted compared to the female purple finch.

Identification Tips

When identifying the Cassin's finch, look for the longer bill which sets it apart from the purple finch. The males are easily distinguishable by their vibrant red hues, whereas the females' less distinct facial markings and streaked brown plumage can be used as identifying features.

Habitat

The preferred breeding habitat of the Cassin's finch is the coniferous forests found in the mountainous regions of western North America, extending as far south as northern New Mexico, Arizona, and the vicinity of Southern California near Baja California.

Distribution

These finches are known to nest in large conifers within their mountainous habitat. During the winter months, they often descend to lower elevations. The northernmost populations are migratory, heading southward, while others may remain as permanent residents. Some non-breeding individuals venture as far south as central interior Mexico in winter.

Behaviour

Cassin's finches are arboreal foragers, though they may occasionally search for food in ground vegetation. Outside of the nesting season, they are often observed feeding in small flocks, a social behavior that provides both safety and company.

Diet and Feeding

The diet of the Cassin's finch primarily consists of seeds, buds, and berries, supplemented by some insects. Their foraging habits take them through the trees and occasionally to the forest floor.

Conservation status

The Cassin's finch is currently listed as Least Concern on the IUCN Red List, indicating that, at present, there are no immediate threats to its population numbers.

This delightful bird bears the name of John Cassin, a notable curator at the Philadelphia Academy of Natural Sciences, whose contributions to ornithology are commemorated through this species.