Slovak Raptor Journal最新文献

Greater spotted eagles (Clanga clanga) pale morph “fulvescens” breeding during five consecutive years 大斑鹰(Clanga Clanga)苍白形态“fulvescens”连续5年繁殖

Slovak Raptor Journal Pub Date : 2023-06-01 DOI: 10.2478/srj-2023-0003

V. Dombrovski

引用次数: 0

Ranging behaviour of an adult female greater spotted eagle (Clanga clanga) wintering in Sudan for 10 years, as revealed by satellite telemetry 一只成年雌性大斑鹰(Clanga Clanga)在苏丹越冬10年的测距行为，这是由卫星遥测技术揭示的

Slovak Raptor Journal Pub Date : 2023-06-01 DOI: 10.2478/srj-2023-0005

B. Meyburg, T. Mizera, G. Maciorowski, D. Karelus, C. Meyburg, M. McGrady

{"title":"Ranging behaviour of an adult female greater spotted eagle (Clanga clanga) wintering in Sudan for 10 years, as revealed by satellite telemetry","authors":"B. Meyburg, T. Mizera, G. Maciorowski, D. Karelus, C. Meyburg, M. McGrady","doi":"10.2478/srj-2023-0005","DOIUrl":"https://doi.org/10.2478/srj-2023-0005","url":null,"abstract":"Abstract Using global position system (GPS) technology, we tracked an adult female greater spotted eagle (Clanga clanga) on its wintering grounds in the Sudan-South Sudan borderland during 2005–2015. There were 10 909 GPS locations for this bird in the non-breeding range. Throughout the study, the eagle showed fidelity to its wintering grounds. The non-breeding season coincided with the dry season. The median arrival date was 11 October (n = 10). The median departure date (n = 10) was 4 March, and was less variable than the arrival date. The 95% kernel density estimate (KDE) for all years was 33 838 km2, and the 50% KDE encompassed 6 585 km2. The wintering range was split between two areas, west and east, with the eagle typically arriving in the western area, where it stayed for some time. It then moved about 330 km to the eastern area, where it would remain for a few weeks before departing for Europe in the spring. In both the western and eastern subareas, the annual home ranges overlapped to a variable extent (14–99%). The high degree of fidelity to the wintering grounds shown by this bird was mirrored by the behaviours of two other adult greater spotted eagles that we tracked (using >1 tracking devices) for 15 years that wintered in South Sudan and Turkey. The number of greater spotted eagles that winter in Africa is a matter of speculation, although virtually all individuals are likely to pass through a narrow corridor near Suez, Egypt. Collectively, these tracking data and the findings of other studies suggest that greater spotted eagles from the western parts of the European breeding range often move to Africa. Further, the Sudd wetlands in South Sudan are important for greater spotted eagles and other rare bird species during the non-breeding season.","PeriodicalId":56343,"journal":{"name":"Slovak Raptor Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89111141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The northern hawk owl Surnia ulula invasions in Europe 北方鹰鸮苏尼亚·乌拉入侵欧洲

Slovak Raptor Journal Pub Date : 2023-06-01 DOI: 10.2478/srj-2023-0001

H. Mikkola, Esko Rajala, Ü. Väli, O. Keišs, V. Jusys, Z. Kwieciński, V. Dombrovski, Thorsten Krüger, J. Hušek, Samuel Pačenovský, Yuriy Kuzmenko, T. Kuzmenko

{"title":"The northern hawk owl Surnia ulula invasions in Europe","authors":"H. Mikkola, Esko Rajala, Ü. Väli, O. Keišs, V. Jusys, Z. Kwieciński, V. Dombrovski, Thorsten Krüger, J. Hušek, Samuel Pačenovský, Yuriy Kuzmenko, T. Kuzmenko","doi":"10.2478/srj-2023-0001","DOIUrl":"https://doi.org/10.2478/srj-2023-0001","url":null,"abstract":"Abstract The northern hawk owl is a real irruptive species that respond to irregular changes in the food supply. When prey levels are adequate, it breeds and winters within northern forests. Decreased prey availability can start winter invasions, the timing and magnitude of which are the subject of this study. Mainly the citizen data were extracted from the national bird websites to obtain data on the number of northern hawk owls observed in 2010–22. This paper demonstrates that through citizen data large amounts of information can be collected over wide areas, entire Europe in this case. From Finland to Poland and Czechia the invasions years were very similar, 2013–14, 2017–18 and 2021–22 but in Sweden and Norway three clear irruption years were a year or two before. In Denmark, the clear invasions years were 2013–14, 2016–17 and 2019–20 but Poland, peak years were not at all as clear as in the other countries. The invasions started earliest in Finland in September and peaked in November. In Estonia and Latvia peaks occurred from November to January. In Poland, irruption peaked a month later in December but continued until April like in Finland, Estonia and Latvia. The origin of the irrupting owls in the region has been debated. In Norway, authors are convinced that owls originate from Fennoscandia but this paper indicates that mass invasions have to originate from northern Russia. However, only in Denmark there was one Russian northern hawk owl ring recovery. Further ring recoveries and preferably GPS tagging and satellite tracking of the northern hawk owls are awaited to have a better picture of invasion movements and future conservation needs.","PeriodicalId":56343,"journal":{"name":"Slovak Raptor Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76271903","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A first detailed description of building a new nest and new data on the courtship behaviour of golden eagle 首次详细描述了金雕筑巢的过程，并获得了金雕求偶行为的新数据

Slovak Raptor Journal Pub Date : 2023-06-01 DOI: 10.2478/srj-2023-0004

I. Angelov

引用次数: 0

Bill deformities in Egyptian vulture (Neophron percnopterus percnopterus): a noteworthy record from Rajasthan, India 埃及秃鹫(Neophron percnopterus percnopterus)的喙畸形:来自印度拉贾斯坦邦的一个值得注意的记录

Slovak Raptor Journal Pub Date : 2023-06-01 DOI: 10.2478/srj-2023-0007

Hira Punjabi, A. Samson

引用次数: 0

Owls’ responses to forest conservation in the Alps 猫头鹰对阿尔卑斯山森林保护的反应

Slovak Raptor Journal Pub Date : 2023-06-01 DOI: 10.2478/srj-2023-0006

V. Nemček, B. Kohl

引用次数: 0

Diet composition of White-tailed Eagles inhabiting two adjacent inland lakes in Northern Greece 居住在希腊北部两个相邻内陆湖泊的白尾鹰的饮食组成

Slovak Raptor Journal Pub Date : 2023-04-28 DOI: 10.2478/srj-2023-0002

Anastasios Bounas, E. Karta, Elisabeth Navarrete, L. Sidiropoulos, H. Alivizatos

{"title":"Diet composition of White-tailed Eagles inhabiting two adjacent inland lakes in Northern Greece","authors":"Anastasios Bounas, E. Karta, Elisabeth Navarrete, L. Sidiropoulos, H. Alivizatos","doi":"10.2478/srj-2023-0002","DOIUrl":"https://doi.org/10.2478/srj-2023-0002","url":null,"abstract":"Abstract In territorial raptors, breeding performance and foraging behaviour are affected by territory characteristics as the abundance and availability of different prey species varies between habitats. In this study, we examined the diet of two White-tailed Eagle pairs, occupying neighbouring territories in two adjacent inland lakes in Northern Greece. We assess the diet composition of the species in the southernmost part of its European range and evaluate any intraspecific differences in the diet that may reflect resource and/or niche partitioning between territories. We found that birds and specifically waterbirds comprise the largest and quantitatively most important part of the White-tailed Eagle´s diet, with fish being the second most important prey group that was only found in the nest remains from one territory. There was high diet overlap between the two territories and when considering only avian prey our results suggest that the species predates on heavier (and the most common) waterbird species. A main factor that could be driving differences in the abundance and availability of different prey species between territories could be lake physiography, as our results point to a segregation and a subsequent resource partitioning between territories, with each pair utilizing an adjacent lake and its associated habitats. Competition and territoriality therefore seem to be important intraspecific interactions that along with prey availability could promote changes in territory size and ultimately affect individual fitness.","PeriodicalId":56343,"journal":{"name":"Slovak Raptor Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82064214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Hunger sweetens the beans: evidence of opportunistic feeding behaviour of the little owl (Athene noctua, Scopoli 1769) from Peloponnese, Greece 饥饿使豆子变甜:来自希腊伯罗奔尼撒半岛的小猫头鹰(Athene noctua, Scopoli 1769)机会主义进食行为的证据

Slovak Raptor Journal Pub Date : 2022-12-01 DOI: 10.2478/srj-2022-0006

Maria Kolendrianou, George Mitsainas, Olga Tzortzakaki, Philippos Katsiyiannis, Theodoros Vythoulkas, Myriam Patrou, G. Iliopoulos

{"title":"Hunger sweetens the beans: evidence of opportunistic feeding behaviour of the little owl (Athene noctua, Scopoli 1769) from Peloponnese, Greece","authors":"Maria Kolendrianou, George Mitsainas, Olga Tzortzakaki, Philippos Katsiyiannis, Theodoros Vythoulkas, Myriam Patrou, G. Iliopoulos","doi":"10.2478/srj-2022-0006","DOIUrl":"https://doi.org/10.2478/srj-2022-0006","url":null,"abstract":"Abstract The little owl (Athene noctua) is a common raptor in Mediterranean habitats. To acquire more information on its diet, this study identified cranial and post-cranial skeletal material from 70 owl pellets collected during the 2016 and 2017 breeding seasons. The material was used to quantify the little owl’s relative prey abundance using MNI (minimum number of individuals), a taphonomical unit. This study is the first to examine the diet of the little owl in the Peloponnese (southern Greece). After examining 3,691 isolated skeletal and exoskeletal remains from the processed pellets, a total of 78 and 108 prey items were recorded for the two consecutive years. This study, in congruence with previous research, showed that in both years the little owl favoured primarily small mammals and arthropods, with a clear predominance of Thomas’s pine vole (Microtus thomasi) and arthropods from the class Diplopoda. Finally, a redundancy discriminant analysis (RDA) was applied to our two-year results, along with those from similar studies in the Mediterranean region, to examine the relationship between habitat types and prey taxa, which supported the little owl’s opportunistic feeding behaviour, depending on variation of ecological factors.","PeriodicalId":56343,"journal":{"name":"Slovak Raptor Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78859663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Diet composition of the long-legged buzzard (Buteo rufinus) in southeastern Bulgaria 保加利亚东南部长腿秃鹰(Buteo rufinus)的饮食组成

Slovak Raptor Journal Pub Date : 2022-12-01 DOI: 10.2478/srj-2022-0001

M. Dravecký, Petar Shurulinkov, Georgi Dilovski, Michal Revický, Girgina Daskalova, J. Obuch

{"title":"Diet composition of the long-legged buzzard (Buteo rufinus) in southeastern Bulgaria","authors":"M. Dravecký, Petar Shurulinkov, Georgi Dilovski, Michal Revický, Girgina Daskalova, J. Obuch","doi":"10.2478/srj-2022-0001","DOIUrl":"https://doi.org/10.2478/srj-2022-0001","url":null,"abstract":"Abstract During 2018–2022, the local breeding population of the long-legged buzzard (Buteo rufinus) in southeastern Bulgaria was monitored in the territory of three districts of Sliven, Yambol and Burgas. Diet data were collected in 15 breeding pairs. Overall, we identified 290 prey items. We used three methods for diet analysis that produced different results: (1) collecting prey remains (68 individuals, 23.5%), (2) collecting pellets and skeletal materials (42 individuals, 14.5%), and (3) collecting data on a diet using trail cameras (180 individuals, 62.1%). The dominant part of the diet formed mammalian species (69.3%, ten species and some undetermined Rodentia and other Mammalia). Birds were less represented but with similar species richness (21.0%, 11 species and pigeons (Columba sp.), thrushes (Turdus sp.), undetermined Passeriformes and Galliformes). Compared to birds, the proportion of Reptilia was lower (9.3%, two species). Amphibia were represented only with one specimen of the common toad (Bufo bufo). The dominant diet of long-legged buzzards in southeastern Bulgaria was European souslik (Spermophilus citellus, 31.0%), followed by sibling vole (Microtus mystacinus, 25.5%). Less abundant taxa were undetermined Passeriformes (6.9%), lesser mole rat (Nannospalax leucodon, 5.9%), pigeons (4.5 %), blotched snake (Elaphe sauromates, 3.8%), Balkan green lizard (Lacerta trilineata, 3.5%), European hare (Lepus europaeus, 3.1%), common magpie (Pica pica, 2.8%), Colubridae (1.7%), common blackbird (Turdus merula, 1.4%), domestic chicken (Gallus gallus domesticus, 1.0%) and Eurasian skylark (Alauda arvensis, 1.0%). Spermophilus citellus was the most abundant species in the Yambol district samples and the most abundant species in the data obtained from trail cameras. In the Burgas district, the dominant species was Microtus mystacinus. When comparing the diet spectrum of Buteo rufinus from other authors, birds occurred more frequently than reptiles in our material.","PeriodicalId":56343,"journal":{"name":"Slovak Raptor Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84404285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Distribution, abundance, and breeding of the imperial eagle (Aquila heliaca) in Western Slovakia in 1977–2022 1977-2022年斯洛伐克西部帝王鹰的分布、丰度和繁殖

Slovak Raptor Journal Pub Date : 2022-12-01 DOI: 10.2478/srj-2022-0005

J. Chavko, Leonidas Prešinský, Roman Slobodník

{"title":"Distribution, abundance, and breeding of the imperial eagle (Aquila heliaca) in Western Slovakia in 1977–2022","authors":"J. Chavko, Leonidas Prešinský, Roman Slobodník","doi":"10.2478/srj-2022-0005","DOIUrl":"https://doi.org/10.2478/srj-2022-0005","url":null,"abstract":"Abstract The distribution, abundance, breeding success, and habitats of the imperial eagle in the mountains and adjacent lowlands of Western Slovakia were studied over the last 45 years (1977–2022), with a total of 65 breeding pairs documented. Of the 589 breeding attempts (range 2–42 per year) that were recorded, 420 were successful (74%) and produced 718 chicks altogether. Breeding success varied considerably across the years, with an average of 1.2 chicks per initiated and 1.7 chicks per successful breeding attempt. Three chicks fledged from 10.7% of the successful breeding attempts, two chicks from 50.2%, and one chick from 39.1% of them. Breeding numbers increased slowly between 1977 and 1997, with a marked increase after 1998. In two of the most recent years, 2020 and 2021, breeding numbers more than doubled. Since 2000, we have observed changes in breeding habitat preferences, where the population has shown more preference for lowland regions than mountains. Natural factors are probably driving the upward population trend, but there has also been action taken with several management measures. The conservation measures involved and their impact on population and range trends are analysed and discussed here.","PeriodicalId":56343,"journal":{"name":"Slovak Raptor Journal","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88385384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0