Distribution, status and population trends in the Temminck's Stint Calidris temminckii in the Finnish Bothnian Bay

Abstract

Distribution and population trends of Temminck's Stint Calidris temminckii were studied along the Finnish coast of the Bothnian Bay. The southernmost birds bred in Vaasa, the northernmost pairs were found in Tornio. The current population size was estimated at 170-200 pairs. Most pairs bred in non-protected, natural habitats on the mainland. Most sites were inhabited by 1-4 pairs. The colony size varied between one and twenty. Comparision with previous censuses revealed that the Temminck's Stint has decreased coastwide during the twentieth century. The magnitude and time of the decline differed from sub-area to another. The causes may include shrinkage and deterioration of habitats and increased predation and human disturbance. Validity of these and other possible explanations are reviewed and discussed.