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Aves, 40/1-4 | 2003 | 106-108

  Black Stork (Ciconia nigra) colour ringing in the Czech Republic - statistics and results: a preliminary report.
Pojer, F.

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Article summary

In line with the agreement on international collaboration in Black Stork ringing launched at the first international Black Stork conservation and ecology symposium, held in Latvia in 1993, colour ringing of the species in the Czech Republic started a year later. Altogether, 584 Black Storks (575 nestlings, 9 adults) were marked with colour rings in 1994-2000. The numbers of birds ringed in individual years are as follows : 1994 - 18, 1995 - 63, 1996 - 106, 1997 - 128, 1998 - 68, 1999 - 94, 2000 - 107. In 1994-1997, orange plastic rings from Spain inscribed with three black numbers and/or letters (the first sign “6” is the country code for the Czech Republic) were used for this purpose. In 1998, the rings were blue ones inscribed with three white letters, originally designed for Cormorants. In 1999, they were again replaced by Spanish green rings, with white numbers and/or letters (the first sign again “6”). Finally, new red rings with white numbers and/or letters, a new country code being the first sign of three point code “H”, from the word CZEC”H”, were used in 2000. The way of ringing was a combination of plastic ring always in tibia and metal ring in tarsus or tibia (the plastic ring in even years in right tibia and in left tibia in odd years). Black Storks were ringed at 105 sites on the whole territory of the Czech Republic: 30 ringers, who collaborate with the Prague ringing centre, the national museum, were involved in the activity. Altogether, 101 recoveries of Black Storks marked by colour rings (i.e. 17%) were obtained by the end of 2000. In Black Storks marked with standard metal rings, this ratio is only apporx. 3%. Most birds (80%) were checked visually, a minority of them was found dead (10%) or wounded (10%). Exceptionally two individuals were killed (shot to death). Most birds (60%) flew along the SE route via Bosphorus and Israel, a lower number (20%) moved to the SW direction via Gibraltar. Only two birds were checked in Central Italy, i.e. just right on the southern route. The others were found in the close vicinity of nests or it was impossible to determine the direction of their migration. During the migration, most birds (52%) were observed in Israel, 11% of them were found in France, in Germany, Hungary and Spain (5-6%). We have not received any recovery from Africa yet. The results will also be discussed in more details (e.g., Wim van den Bossche’s activity in Israel). In addition to the data on migration, the first information on nest settlment of Black Stork young was also obtained (one apporx. 40 km SE in the Czech Republic, another 420 km NW in Germany). Wintering of the species on ISrael was confirmed. Now some interesting findings: two siblings from the same nest were observed respectively in Spain and Bulgaria, two other siblings were both found in Central Italy. A young was reported from Corsica, another one two times during ten days (Switzeland and France). Some other birds were repeatedly found in consecutive years, maximally four times. Because the research is expected to continue in the future, the above results should be considered as preliminar ones.

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