Cassin's finch (Haemorhous cassinii) is a bird in the finch family, Fringillidae. This species and the other "American rosefinches" are placed in the genus Haemorhous. Adults have a short forked brown tail and brown wings. They have a longer bill than the purple finch. Adult males are raspberry red on the head, breast, back and rump; their back and undertail are streaked. Adult females have light brown upperparts and light underparts with brown streaks throughout; their facial markings are less distinct than those of the female purple finch. Adults are 6.3 inches in length. Cassin's finches have been recorded in the COSA from April to May and November to December