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Latin name

Stercorarius parasiticus

Family

Skuas (Stercorariidae)

Overview

A medium-sized dark-looking seabird with pointed wings, and pale patches at the wingtips. Often seen flying low and fast above the waves in pursuit of a tern or other bird, sometimes chasing it high into the air, twisting and turning, to make it drop its food. It comes to land only to breed and is aggressive towards intruders into its breeding territory.

Where to see them

In summer it is most easily seen in the Shetland and Orkney islands, and on some coastal moorlands of north and west Scotland; on passage best looked for from coasts in August and September, especially in areas near tern colonies where there are good numbers of feeding terns.

When to see them

Summer (on breeding grounds) and spring and autumn (on passage).

What they eat

Mainly fish, some eggs and young birds.

Estimated numbers

* UK breeding is the number of pairs breeding annually. UK wintering is the number of individuals present from October to March. UK passage is the number of individuals passing through on migration in spring and/or autumn.

Distribution

In the UK

Northern Scotland (breeding) and around coasts (passage)

In Europe

Iceland, N Scandinavia

Worldwide

N and S America, Europe, Africa and Asia

Please note that the map is only intended as a guide. It shows general distribution rather than detailed, localised populations.

Find out more

• Videos

Audio is from commercial recordings Bird Songs and Calls of Britain and Europe on 4 CDs or Bird Sounds of Europe & North-west Africa, copyright WildSounds & CEBA (www.wildsounds.com, (UK) +44 (0) 1263 741100)

2 illustrations 12

Adult

Juvenile

Similar birds

Great skua

Long-tailed skua

Pomarine skua