Rook BTO - British Trust for Ornithology

British Trust for Ornithology Shop – BTO Services Ltd.

Rook Behaviour Guide BTO - British Trust for Ornithology

Rook The Wildlife Trusts

Identification of Juvenile Rooks and Carrion Crows - Corvid Isle

Rook & Wren

How to identify which “Black” bird it is! – Woodland Ways Blog – Bushcraft and Survival

Corvids: Their Differences and Similarities – Spiritual Carol Blog

Rook The Wildlife Trusts

Rook (Corvus frugilegus) - British Birds - Woodland Trust

The Secret Life of Crows

Identification of Juvenile Rooks and Carrion Crows - Corvid Isle

Cambridge corvid cognition lab saved from closure by public donations

Rook Wildwood Group

Identify crows Wildlife Watch

King of the Ring - Ireland's record-breaking birds - BirdWatch Ireland