Rook

ROOK substantive, bird that looks very similar to the crow.
— Rooks (corvus fruqilegus, Linn.) are smaller than crows, their bill is longer and sharper. Males are 50 cm (20 in) long ; females, smaller and not quite as shiny, lay three to five eggs of a greenish blue color, usually spotted. Rooks are found in almost all of Europe, and they are gregarious all the year through. They feed on worms, shellfish, crustaceans, decaying flesh, grain, insects, nuts, lizards, etc… they can be trained to imitate the voice of animals, but they are less intelligent and less docile than common ravens, crows and jackdaws.
 
Extract from the Trousset encyclopedia, 1886 – 1891.