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Common Guillemot (photo courtesy Bernhard Elsner)
Common Guillemot (photo courtesy Bernhard Elsner)
Common Guillemot sites cared for by the Trust
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Mingulay, Berneray and Pabbay

Mingulay, Berneray & Pabbay

The largest colony at a Trust property is on Mingulay/Berneray.

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Nests in extraordinarily high densities on ledges and on inaccessible cliffs.

The largest colony on NTS property is at Mingulay/Berneray, followed by St Abbs, Fair Isle and St Kilda, totalling some 15% of the Scottish population.

Food

Mainly variety of fish; haddock, herring, capelin, sand eels, whiting, pollack, saithe to name but a few. Diving depths vary but mainly up to 20m but have been recorded at 60m and staying down for a maximum 68s.

Nest site

Rocky cliffs and sea stacks or islets with broad or medium ledges, fissures, crevices and between or beneath boulders.

Breeding

Mid April to late June and lay 1 egg.

Wintering

Southern Norway, North Sea, Irish Sea, English Channel and Bay of Biscay.

Distribution

Mainly variety of fish; haddock, herring, capelin, sand eels, whiting, pollack, saithe to name but a few. Diving depths vary but mainly up to 20m but have been recorded at 60m and staying down for a maximum 68s.

Other Information

Simple black bills and a brownish-black back distinguish this species from other British auks. The cliffs on the west coast of Mingulay and Berneray hold the largest colony of Common Guillemots on NTS property.

Other Auk family birds at Trust sites