A male saffron finch (Sicalis flaveola), a species of tanager endemic to South America. Although frequently called a canary, the species is not related to the Atlantic canary. When nesting, the saffron finch typically makes use of cavities such as abandoned rufous hornero (Furnarius rufus) nests, bamboo branches, and the underside of house roofs. Males are polygamous, mating with two females during the nesting season.Photograph: Charles J. Sharp