Also found in: Dictionary, Thesaurus, Wikipedia.
(Spinus spinus), a bird of the family Fringillidae of the order Passeriformes. The body length is about 12 cm, and the weight, 12 to 14 g. The plumage is yellowish green with dark streaks. Siskins are distributed in Eurasia; in the USSR they are found in the zone of coniferous forests, in the forests of the Crimea and the Caucasus, and the pine forests of Kazakhstan. In the winter they wander in flocks, particularly along river valleys with thickets of hardwood trees. Siskins usually nest in spruces or pines. The clutch contains four or five eggs, which are incubated by the female for 12 days. Sometimes siskins nest twice in one summer. The diet consists of seeds of coniferous and hardwood trees, particularly alders, and aphids and other tiny insects. Siskins are often kept in cages.