Rookery

Crows,or to be more precise Rooks,are gregarious birds that build communal nests called a rookery.Close to my house there are dozens of Rooks' nests.They are mostly built high on Sycamore trees or Ash(as in the video)but Beech and Maple are also chosen along withthe occasional evergreen.The nests are large and can be seen from a distance on deciduous trees.