Census of Lapwing and Curlew

Lapwing and curlew have been surveyed since 1967, this now takes place in a field area south of Nyängen. The short version of the results is that the Lapwing held its population number relatively well while the curlew declined and recently been lost as a breeding species in Kvismaren. The lapwings also breed in restored wetlands and have been gradually increasing, while the large-scale agricultural changes have not been accepted by the curlews.

Osprey

In 1971, in collaboration with the Museum of Natural History we started a census of Osprey. The origin of this collaboration was the poor breeding performance of Ospreys seen at the end of the 1960s. Almost simultaneously, reports came from abroad about the thinning of their egg shells that affected many bird species and could be attributed to the use of DDT. It turned out that Swedish Ospreys were influenced by this; at its worst around 15% of the population (in the early 1970's).

Bird Ringing

Bird ringing is the most time consuming activity at the bird observatory, starting after midsummer and continuing for the remainder of the season until the end of September. When the weather is favourable, ringing takes place every morning from sunrise to noon.

The ringing is standardised which means that the same number of mist nets are used at the same sites year after year. Through this standardisation it is possible to compare different years and analyse changes in the bird populations.