Birdwatch: without ash, whither rooks?, Birds

Large swathes of the Somerset Levels have no rookeries at all as ash dieback disease takes its toll on trees

BBC - Autumnwatch Blog: How and where to see rooks roosting

Birdwatch + Birds, Environment

Rook (bird) - Wikipedia

Rook (Corvus frugilegus) - North American Birds - Birds of North America

Rook (bird) - Wikipedia

Rook - BirdWatch Ireland

Rook (bird) - Wikipedia

Rook - BirdWatch Ireland

2020 Birdwatch (nature heals in an unlikely year) – Random Storyteller

Rook New Zealand Birds Online

Rook New Zealand Birds Online

Birdwatch + Birds, Environment

Rook - BirdWatch Ireland

Rook (Corvus frugilegus) - British Birds - Woodland Trust

Rook New Zealand Birds Online