Sexual dimorphism is here displayed by the brick-colored male Orchard Oriole and the yellow female. Orchard Oriole is an eastern species who breeds no farther west than western El Paso and Pueblo counties and it breeds on the Chico. They arrive in mid- to late May and depart early, as early as mid-July since they only produce one brood per year. They are a tropical species wintering from southern Mexico south to northern South America. The males are stunning and their song is loud. In ideal habitat they are semi-colonial in their breeding.