Rook, Corvus frugilegus, is a species of passerine bird in the crow and jay family found in cropland and urban ecosystems.

Corvus frugilegus has a breeding population size of 3740000-6630000 pairs and a breeding range size of 1190000 square kilometres in the EU27. The breeding population trend in the EU27 is Decreasing in the short term and Uncertain in the long term.

The EU population status of Corvus frugilegus was assessed as Secure, because the species does not meet any of the IUCN Red List criteria for threatened or Near Threatened, or the criteria for Depleted or Declining (the EU27 population or range has not declined by 20% or more since 1980).