Rook
Corvus frugilegus
Rågen er en kragefugl i ordenen af spurvefugle. Den har en længde på 45–48 cm.
Black crow the size of a Hooded Crow, with a blue-purple gloss; show a pale, bare greyish-white patch at the base of the long, pointed grey-white bill, a peaked crown and feathered "trousers" on the legs. Gregarious.
Can be confused with
- Carrion Crow — Carrion Crow is also all black but has a heavier, curved bill feathered right to the base (no bare patch), a rounded crown and is usually seen singly.
- Hooded Crow — Hooded Crow has a grey body with black head, wings and tail — the Rook is all black.
- Western Jackdaw — Jackdaw is clearly smaller with a pale eye and grey nape; the Rook is larger and all black with a long pale bill.
Plumage and variation
Male and female: Sexes alike — no visible difference in the field.
Juvenile: Juvenile has a fully feathered bill base and so resembles a Carrion Crow; the bare pale patch develops only during the first year.
Voice
A flat, hoarse "kaah", less harsh than a crow's; from colonies a continuous din of grating calls.
Behaviour
Highly gregarious; breeds in tree-top colonies (rookeries) and forages in flocks on fields, probing for invertebrates and grubs. Gathers in large communal roosts in winter.
When and where
A common breeder over most of Denmark, clearly most numerous in eastern Jutland and on the islands; resident, supplemented by Nordic migrants and winter visitors.
Facts
Wingspan
93 cm
Conservation status
ikke truet
Relatives
Family
crows and jays
Corvidae
Order
passerines
Passeriformes
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