Numbers and distribution of Red-footed Falcons (Falco vespertinus) breeding in Voivodina (northern Serbia): a comparison between 1990-1991 and 2000-2001
2008; Volume: 138; Issue: 1 Linguagem: Inglês
ISSN
2295-0451
Autores Tópico(s)Bird parasitology and diseases
ResumoThe survey of population size and distribution of Red-footed Falcons proceeded in June-July 2000 and 2001 respec- tively, ten years after the first census (1990 and 1991). Data of only those nests were processed in which there was breeding. Breed- ing success was calculated from the number of offspring per reproductive female. During the survey in Voivodina in 1990-1991 there were 308 and 124 pairs, respectively, whereas ten years later, in the year 2000 there were 116, and in 2001 only 61 pairs of Red-footed Falcons. Even if the marked fluctuations observed are not considered, the Red-footed Falcon population breeding in Voivodina shows a declining tendency. The south-western margin of the distribution area has moved towards the northeast by about 50-70 kilometres. More than 90% of the nesting sites, including the larger nesting colonies, are found in the Banat region, i.e. east of the Tisa River. More than 90% of the Red-footed Falcons continue to nest in Rook colonies. No significant change has occurred in their breeding success.
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