Rooks, ravens and relations - BirdGuides

A comprehensive genetic analysis of all the recognised species and many subspecies of the cosmopolitan crow genus Corvus has been performed with some surprising results.

Rook - Sentinel Of The Farmlands

Rook (bird) - Wikipedia

The Rooks (Corvus frugilegus) Information

Details : Raven - BirdGuides

Corvid of the month: Rooks

Crows, ravens and rooks

Family Corvids Collection Birds Comparison Raven Rook Magpie Black

Rook

Identify a Rook, Corvus frugilegus