Colonial breeding of the Mute Swan (Cygnus olor) on Lake Liepajas, Latvia
1998
Lipsbergs, J. (Institute of Biology, Riga (Latvia). Lab. of Ornithology)
A total census of breeding Mute Swans on Liepaja lake (SW Latvia) in 1997 revealed 220 nests, and at least 800 non-breeding individuals. This was the highest number of breeding pairs recorded for this lake ever, and was also a record number for any water basin in Latvia and the Baltic states. Thus, colonial breeding of the Mute Swan was recorded for the first time in this region. The Liepaja lake is also known to be the most important wintering site for the Mute Swan in Latvia and one of the major sites on Eastern coast of the Baltic Sea. The author had recorded some similiar cases of closely situated Mute Swan nests at other lakes in Latvia in preceding years too.
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