Rooks are very social birds and best scavengers

Did you ever notice that Rooks have a gular pouch?

Are crows the smartest animals of all?

The rook: myths, history & identification - Saga

What is the difference between crows, ravens and rooks? How can you tell them apart? - Quora

What is the difference between crows, ravens and rooks? How can you tell them apart? - Quora

Rook Bird Facts (Corvus frugilegus)

43 Types of Crows, All Corvus Species

The Mystery Of The Crow: Do They Really Sense Death? - Bird Therapy.

Meet The Scavengers Of African Savannah- The Opportunistic Carnivorous, by African Safaris Hub

Birds - Hucknall Wildlife Group

The Secret Lives of Words column: A mindful murder of crows