Mark Cocker indulges his obsession as he follows a colony of rooks over the course of a year
Radio 4,Β·4 episodes
At dusk, 40,000 rooks gather in the Yare Valley in Norfolk.
Some rookeries date back hundreds of years. Why are birds so loyal to one site?
As summer warmth dries out the earth, the young rooks have a hard time finding enough food
The summer's scattering of rooks is over and their communal urges bring them together.
