کلاغ سیاه

The rook, scientifically known as *Corvus frugilegus*, is a species within the genus *Corvus*. It belongs to the family Corvidae, order Passeriformes, class Aves, and phylum Chordata. The authority for this classification is attributed to Linnaeus in 1758. It is also referred to by the common names Ydfran, Saatkrähe, and Graja, and is part of the crow group.

The species has a conservation status of Least Concern according to the IUCN Red List as of 2025. Its range includes locations such as Hefei, the Nanling Mountains, and Poland. Physical characteristics include a wingspan of 0.93 and a mass of 489. Reproductive data indicates an egg incubation period of 16 and a litter size of 3.7. The bird was named Bird of the Year and is described in the Encyclopædia Britannica 11th edition.