Dynamics of the Onset of White-Tailed Eagle (Haliaeetus albicilla) Breeding in the Central Part of the Volga–Kama Region and Possible Explanations

Bekmansurov, R. Kh.

doi:10.1134/s1062359020070031

Cited by 1 publication

(3 citation statements)

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“…During nests examination, the breeding success was studied, the difference in the breeding time of individual pairs was determined. To define the age of the White-Tailed Eagle nestlings, the wing length was measured (Helander, 1981), and the development of the feathers was compared (Bekmansurov, 2018). We studied prey items which were fixed according to remains found under the nests and in them.…”

Section: Methodsmentioning

confidence: 99%

“…The latest breeding took place in 2021 with egg laying around March 25 and April 2-3 in two different nests. In general, the periods when the breeding started and their asynchrony correspond to those in the central part of the Volga-Kama Territory (Bekmansurov, 2019).…”

Section: гнездовые территории на левобережье р камы в нечкинском лесничестве и вблизи его границmentioning

confidence: 96%

“…Apparently, there was an increase in the peregrine falcon population in the NP. The population increase of this falcon on the Middle Kama led to its increase on the Lower Kama (Bekmansurov, 2020). This species requires special protection, since it often becomes the object of illegal taking from the natural environment for commercial purposes (Krever, Ivannikova, 2020).…”

Section: пернатые хищники и их охрана 2021 43mentioning

confidence: 99%

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Results of researches of some rare species of raptors in the Nechkinsky National Park, Russia

Bekmansurov

2021

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This report presents the selected results of rare birds of prey studies in the Nechkinsky National Park (Udmurt Republic, Russia) 20 years after the first studies undertaken here by I.V. Karyakin in 1991–1996. The main efforts were directed to the study of the White-Tailed Eagle (Haliaeetus albicilla). At the same time, the identification of other rare species was made. The studies were carried out during short visits to the territory in 2016, 2017, 2019 and 2021. In the national park (NP), within the previously known breeding areas, 3 new nests were identified. They were 0.9–1.6 km displaced from the locations of the old nests found 20 years ago. A new breeding territory was found in the adjacent area near the border of the NP. Despite the incomplete study of the area, it is assumed to be 8-9 breeding areas in the national park, and 2–3 areas directly along its borders. The number of breeding pairs of eagles in comparison with the first half of the 1990s, according to the author, remains stable, and population increase, as happened on the Lower Kama in Tatarstan, has not been observed here. Eagles nest on large, old-growth pines and larch trees, with a distance of 130–530 m deep into the forest from the outer edge. The distance to the Kama River is 0.68 km on average (0.13–1.3 km, n=4). The minimum distance between the nearest neighbors in the Kama valley, unregulated by the reservoir, is currently 3.6 km, the average (n=3) – 3.9 km. Eagles breed occasionally on and off. No reproduction was recorded for 2–3 years. The period of egg laying extends for a month from the beginning of March to the beginning of April. The death of young birds on 6-10 kV power lines was revealed, as a result, the owners were obliged to equip the power lines with bird protection devices. White-Tailed Eagle nestlings were ringed with colored rings. Two repeated observations were obtained from the lower reaches of Kama. The Greater Spotted Eagle (Aquila clanga) continues to inhabit the National Park, which is confirmed by the meetings of adult birds. There has been two-three times population of the Peregrine Falcon (Falco peregrinus) in comparison with the first half of the 1990s. Breeding of this falcon was found on 2 territories with a distance of 16.5 km between them.

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Section: Methodsmentioning

confidence: 99%

Section: гнездовые территории на левобережье р камы в нечкинском лесничестве и вблизи его границmentioning

confidence: 96%

Section: пернатые хищники и их охрана 2021 43mentioning

confidence: 99%

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Results of researches of some rare species of raptors in the Nechkinsky National Park, Russia

Bekmansurov

2021

View full text Add to dashboard Cite

show abstract

Dynamics of the Onset of White-Tailed Eagle (Haliaeetus albicilla) Breeding in the Central Part of the Volga–Kama Region and Possible Explanations

Cited by 1 publication

References 11 publications

Results of researches of some rare species of raptors in the Nechkinsky National Park, Russia

Results of researches of some rare species of raptors in the Nechkinsky National Park, Russia

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