Bocian biały Ciconia ciconia w Łomżyńskim Parku Krajobrazowym Doliny Narwi i jego otulinie w latach 1999-2014
Journal Title: KULON - Year 2014, Vol 19, Issue
Abstract
The study was conducted in 1999-2014 in the Łomża Landscape Park in the Narew Valley (73.5 km2) and its buffer zone (123.1 km2), in total 196.6 km2 (central point: 53°08′N; 22°12′E). During 16 years of the study, a significant increase was recorded in the number of nesting pairs (r = 0.56; p = 0.023). The mean density over this period was 48.8 pairs/100 km2 (SD = 6.4). The highest densities were in 2012 and 2013 (57.5 pairs/100 km2), and the lowest in 2002 (37.1 pairs/100 km2). Along with the increase in number, the breeding success increased. The average number of young raised by a pair varied from 1.73 in 2001 to 3.06 in 2010 (JZa mean 2.43; SD = 0.4), and the average number of young raised by a successful pair varied from 2.15 in 2001 and 2003, to 3.23 in 2010 (JZm mean 2.71; SD = 0.3). Among the pairs with offspring, broods with 2 and 3 nestlings dominated (32.0% and 38.7%, respectively), while broods with 4 and 5 offspring made up 17.0% and 2.7%, respectively. In 2013-2014, the great majority of the nests was situated on electric poles (74.4% and 77.2%), whereas ca. 1/4 of the inventoried breeding sites was located on building roofs. During the study period, the number of colonies varied from 5 in 1999 to 10 in 2004. The median date of the arrival of the first bird on the nest was the 81st day of the year. Although the number of the White Stork breeding pairs on the Natura 2000 special protection area „Ravine Valley on the Narew River” (which actually lies within the borders of the Park – in 96.8%) does not make up at least 1% of the national population, yet it reached one of the highest densities in Poland (66.7 pairs/100 km2), and in 2014, the StDB index was 169.4 pairs/100 km2. Due to this, the White Stork deserves recognition as the subject of protection of the Natura 2000 site.
Authors and Affiliations
Adam Zbryt
Keywords
Related Articles
- EP ID EP167746
- DOI -
- Views 82
- Downloads 0
Zgrupowania lęgowe ptaków terenów otwartych Wilanowa
The survey of avifauna of open habitats was conducted in the Wilanów district (south Warsaw) in 2011. Birds were counted at two sites: „Wilanów – nieużytki” (25 ha) and „Wilanów – pola” (25 ha). 29 and 10 bird species we...
Pierwsze stwierdzenie świstuna amerykańskiego Mareca americana na Nizinie Mazowieckiej
On 16 March 2017, we observed a male American Wigeon Mareca americana on the flood waters of the Bzura River near Ktery (Łódzkie voivodeship). Our report was verified and accepted by the Polish Avifaunistic Commission as...
Stanowiska szczeżui chińskiej Sinanodonta woodiana (Lea, 1834)(Eulamellibranchia: Unionidae) w środkowej Wiśle
On 23 March 2017, the shell of the Chinese pond mussel Sinanodonta woodiana was found on the left bank of the Vistula River at the mouth of the warm-water discharge canal of the Kozienice power plant (Central Poland). Ea...
STWIERDZENIE CORBICULA FLUMINEA (O. F. MÜLLER, 1774) (VENEROIDA: CORBICULIDAE) W WIŚLE W WARSZAWIE
Two empty shells of the Asian clam Corbicula fluminea were recorded on left bank of Vistula river in Warsaw (52°17’07”N, 20°59’42”E) on 29 June, 2016 (photo 4). Altogether, 19 paired and 76 single empty valves were colle...
TRZECI PRZYPADEK LĘGU SZABLODZIOBA RECURVIROSTRA AVOSETTA NA NIZINIE MAZOWIECKIEJ
On 13 May to 11 June 2016, one pair of the Avocet Recurvirostra avosetta nested (photo 3) on the field water pool located at the southern end of the Biosphere Reserve „Kampinos Forest” (the Warsaw West district).This pai...