Black Guillemot

Short abstract from the book:
The black guillemot breeds in colonies in the Kattegat, and the Danish population is estimated at 1,000 pairs. Of 2,913 ringings, 397 have been recovered, 22 from abroad. Most birds were ringed at Nordre Rønner and Hirsholmene. Birds leave the colonies in August, first-year birds earlier and further than adults. Birds from the two northernmost colonies at Nordre Rønner and Hirsholmene travel S and are mainly recovered in southern parts of Kattegat. Young birds are also recovered in the Little and Great Belts. Most birds from Sejerø and Hesselø stay in southern parts of Kattegat. The black guillemots return to the colonies in February–March. Most birds settle to breed in the same colony as they hatched, although a few settle elsewhere. The adults are very faithful to their breeding colonies and pair mates, and they often use the same nest for years. Many birds from the Swedish Kattegat colonies are found in Denmark, most in July and February. Birds from the Baltic colonies have been recovered in Denmark, most at Bornholm and southern Zealand. The main reported cause of death of recovered black guillemots is hunting (31 %) and drowning in fishing nets (20 %).

Read more about the species in the chapter from The Danish Bird Migration Atlas here

Ringing data for Black Guillemot

Datavisning: genmeldinger    genmeldinger/mærkninger    mærkninger