The Rook is a Eurasian crow, not a regular wild bird in the United States. Adults have black plumage and pale bare skin at the base of the bill. Rooks often feed in flocks in open farmland.
Appearance
Appearance
Adults are about 17–19 in (44–47 cm) long, glossy black, and show pale bare skin around the bill base. Young birds keep dark feathers around the bill base through much of their first year.
Where it lives
Typical habitats
farmland
open fields
groves of tall trees
Range
Native to Eurasia, this species is not a regular wild bird in the United States.
Seasonal presence
Some populations stay near their breeding grounds, while others migrate south for winter.
Behavior
Diet
Rooks search farmland for seeds, roots, and soil .
Social life
They commonly feed in flocks and are .
Life cycle
Nest
Many pairs place stick nests close together in tall trees.
Clutch size
In Britain, usually 3–4 eggs
Incubation
In Britain, the female usually keeps the eggs warm for 15–16 days.
Fledging
In Britain, young usually leave the nest after 32–34 days.
Name and classification
About the name
Western Rook (Corvus frugilegus frugilegus) and Eastern Rook (Corvus frugilegus pastinator) are of the Rook.