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Aves, 40/1-4 | 2003 | 20-24

  Black Stork (Ciconia nigra) in the Czech Republic: Present Status and Conservation.
Pojer, F.

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Article summary

The distribution of the Black Stork in the Czech Republic evolved rapidly during rhe 20th century. Only a few pairs nested in southern Moravia from the end of 19th century until 1930, while the species now breeds throughout the whole Czech Republic. The successful penetration into Moravia and Bohemia,,that began in the late 1940s ad early 1950s, has been well documented up to present time. The estimated numbers of breeding pairs during different periods since 1930 area: 4-5 pairs until 1930, about 20-25 pairs in 1942-1945, 5à pairs in 1964, 100-150 pairs in the late 1970s, 200-300 pairs by 1989. The last census of breeding pairs in 1994 gave an estimate of 320-330 pairs. The next estimation will be a result of the third Breeding Bird Distribution Mapping in the Czech Republic in 2001-2003 organised by the Czech Society for Ornithology. It seems that the numbers of Black Stork breeding pairs are quite stable and that they have had a very good productivity in the Czech Republic during the 1990s. In 1994-2000, the authors checked annually more than 40 nesting territories in a study aerea in central and south-western Bohemia. 20-30 nests were occupied in the above area and number of successful nests with hatchlings varied between 13-19 (13, 17, 13, 17, 19, 14, 19). Black Stork pair relatively often change and abandon their nest (sometimes because human disturbance or because of the nest falling down the tree but sometimes also without an apparent cause). On the other hand, we know a nest that has been annually occupied in 1987-2000, and all the youngs were successfully reared from this nest. The number of offsrping in successful nests varied in the range (2.60) 3.18 - 3.62 (3.77) young per nest in 1994-2000. Altogether, there were 368 youngs in 112 nests (average size is quite high - 3.29 young/nest). Under the Czech National Council Act No. 114/1992 Gazette on Protection of Nature and the Landscape, the Black Stork is listed as Specially Protected Species. A significant proportion of the population (more than one third) is located in Protected landscape Areas and National Parks as well in IBAs. Similarly, the EC’s NATURA 2000 network being established under the Bird Directive in the framework of the EU accession process will be very important for the Black Stork conservation. Landscape protection and management, favourable for the above bird species, is also carried out within the Ministry of the Environment’s Landscape Management Programs. They improve inapropriate activites in the landscape (Water System Restoration Scheme - removing canalizations and making watercourses more natural), establishing sewage treatment plans, restoration and creation of small water reservoirs, pools and ponds. At sites where Black Stork’s nests fell down or are threatened, artificial nest platforms are erected.

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