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Description
Sømosen is situated west of the suburb of Herlev, next to Lautrupparken. The green area, of which one third is a park with grass and scattered bushes, is neighbour to many large institutions and popular for a short walk in the open air. The bog itself was formed in a hollow after the last Ice Age. It is drained by the stream of Sømose Å. The bog was previously very overgrown, but during the 1980’s the municipality of Ballerup carried out an extensive re-establishment project, opening up large stretches of water and recreating islands and islets where birds can breed without being disturbed. Sømosen has developed into a little oasis with a rich birdlife. In addition to the large colony of Mouette rieuse, three species of grebe breed here ( Grèbe castagneux, Grèbe huppé and Grèbe jougris), together with many waterfowl. Waders include Vanneau huppé and Petit Gravelot. Sterne pierregarin breed here and can be seen foraging throughout the summer. Passerines include Coucou gris, Rossignol progné and many warblers. The biggest attraction for birdwatchers is probably breeding Rémiz penduline. However, the tits have unfortunately not nested here the last few years, although they can sometimes be spotted in the area in spring.
Sømosen is also an excellent locality for migrating and staging birds both spring and autumn. Geese, ducks ( Sarcelle d'été , Sarcelle d'hiver , Canard pilet , Canard siffleur , Canard chipeau and Canard souchet ) can be observed. Raptors include a fair number of Buse variable and smaller numbers of Bondrée apivore, together with infrequent visitors such as Milan royal, Buse pattue, Pygargue à queue blanche, Busard Saint-Martin, Busard des roseaux, Balbuzard pêcheur (often seen foraging) – and with some luck Faucon émerillon and Faucon pèlerin. Butor étoilé has been observed on a few occasions. If there are easterly winds flocks of Grue cendrée may appear. Many waders ( Huîtrier pie , Vanneau huppé , Petit Gravelot , Chevalier aboyeur , Chevalier culblanc , Chevalier sylvain , Chevalier guignette, Bécassine des marais og af og til Bécasse des bois ).
In addition, Goéland brun and Goéland marin and even Sterne caspienne are occasionally seen. Also sparrows, a lot of larks, pipers, wagtails, swallows, thrushes and finches rest and pull in and over the bog. Panure à moustaches is seen occasionally. Rougequeue à front blanc , Tarier des prés, Traquet motteux, Gobemouche gris, Gobemouche noir, Pie-grièche écorcheur and Sizerin flammé and Sizerin cabaret are seen regularly. Rousserolle turdoïde has visited the bog for a single year.
In the winter months many wildfowl can be seen and visitors from northern Scandinavia may turn up: Cygne chanteur, Oie des moissons and Bernache du Canada. In periods of frost, one may be lucky enough to see Râle d'eau foraging at close range in Sømose Å or even a Bécassine sourde. In some years there can be invasions of Grive litorne, Grive mauvis or Jaseur boréal, and many colourful finches.
Détails
Accès
If using public transport, Sømosen is most easily reached from Copenhagen by taking bus 350S and getting off at Københavns Teknikum (the Copenhagen University College of Engineering) in Ballerup. One can also take the local 167/168 bus from Herlev Station (get off at Herlev Stadium and walk down Rørløkken to Sømosen). If coming by car, it is possible to park on Vingekrogen. There is a bird observation tower in the south-east corner of the bog, and in the north-east corner is a jetty which is very useful as a look-out post.