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July 26, 2026Sources cited
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Science & Nature • Ornithology

Rook

The rook (*Corvus frugilegus*) is a large, sociable crow in the family Corvidae, native to the Palearctic.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 26, 2026|2 min read| Fact-checked

The rook (Corvus frugilegus) is a large, sociable bird in the family Corvidae, native to the Palearctic region. It is known for its black plumage, bare grey-white skin at the base of the bill, and colonial nesting in treetop rookeries. Rooks are often seen in flocks and are closely related to other corvids such as the crow and raven.

Description

Rooks are large black corvids with glossy plumage, a pale bare patch around the bill, and feathering on the thighs that helps distinguish them from similar crows. They are usually seen in groups rather than alone.

Distribution and habitat

The species is native to the Palearctic and occurs across much of Europe and Asia. It favours farmland, grassland, river plains, and other open or semi-open habitats with scattered tall trees.

Behaviour and diet

Rooks are highly social birds that feed and roost in flocks and breed in colonies. Their diet is mainly made up of insects, earthworms, seeds, roots, and other foods taken from the ground.

Breeding

Breeding rooks gather in communal nesting sites called rookeries, usually in the tops of tall trees. These nesting colonies can persist for many years and may be close to villages, farms, or graveyards.

Conservation and status

The species is generally widespread and common in much of its range, though local populations may decline in some regions. In the UK it is listed as Amber under Birds of Conservation Concern 5.

Key facts

  • Rooks are members of the crow family and are classified as Corvus frugilegus.
  • They are found across much of Europe and Asia in the Palearctic region.
  • Adults are identified by the pale, featherless skin around the bill and their shaggy thigh feathers.
  • Rooks nest communally in tall trees, forming colonies known as rookeries.
  • The species has been introduced to New Zealand, where it is established.
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Canadian context

Rooks are not native to Canada and are not generally part of the country’s common birdlife, but they may be of interest to Canadian birders and naturalists as an introduced species in New Zealand and a Palearctic corvid species.

Frequently asked questions

What is a rook?
A rook is a large crow in the species Corvus frugilegus, native to Eurasia and known for colonial nesting and a bare patch of skin at the base of the bill.
How can a rook be identified?
Adults are identified by their black plumage, grey-white bare facial skin at the bill base, and shaggy thigh feathers.
Where do rooks live?
They live in open and semi-open habitats across much of Europe and Asia, especially farmland, grassland, and river plains.
What do rooks eat?
They feed mainly on insects, earthworms, seeds, roots, and other ground-foraged food.
What is a rookery?
A rookery is a communal nesting colony of rooks, usually built in the tops of tall trees.

References

  1. Wikipedia — https://en.wikipedia.org/wiki/Rook_(bird)
    Supports: Scientific name, family, range, and colonial nesting
  2. The Wildlife Trusts — https://www.wildlifetrusts.org/wildlife-explorer/birds/crows-and-shrikes/rook
    Supports: Identification, habitat, size, diet, and rookeries
  3. British Trust for Ornithology — https://www.bto.org/learn/about-birds/birdfacts/rook
    Supports: Identification, behaviour, habitat, nesting, and UK conservation status
  4. Encyclopaedia Britannica — https://www.britannica.com/animal/rook-bird
    Supports: Species description, range, and nesting behaviour
  5. New Zealand Birds Online — https://www.nzbirdsonline.org.nz/species/rook
    Supports: Introduction to New Zealand