Population of Saker Falcon (Falco cherrug) in Western Slovakia between 1976 and 2010

The population of Saker Falcon in Western Slovakia was under a systematic monitoring since 1976. Gathered data were used to assess the distribution and population trends. The population has grown almost fourfold, from 7 pairs in 1979 to 27 pairs in 2010. During the study period nesting of 47 pairs was recorded. A total of 797 juveniles fledged successfully from the nests. The area of distribution has changed and increased significantly, majority of the pairs from mountains has moved to the lowland cultivated land. Management measures, such as guarding of the nests and installation of nest boxes, were of crucial importance for the population. Nowadays the population is dependent on artificial breeding opportunities and alternate feeding sources, as Feral Pigeon is the most common prey at present. Negative factors were surveyed as well. Several actions for its elimination were carried out, such as insulation of dangerous power lines, reduction of illegal activities, management of nesting and breeding habitats. Implementation of most of the measures would not be possible without different conservation programmes.