Ornis Svecica最新文献_第4页

Autumn migration of Jack Snipe Lymnocryptes minimus in southern Sweden: results from ten years of crepuscular ringing 瑞典南部杰克鹬的秋季迁徙:10年的黄昏鸣响的结果

Ornis Svecica Pub Date : 2021-01-01 DOI: 10.34080/os.v31.22319

A. Bergner, Christer Elderud, Kent E. Person, L. Gezelius

引用次数: 0

Pattern and predictability of potential wind assistance for waders and geese migrating from West Africa and the Wadden Sea to Siberia 从西非和瓦登海向西伯利亚迁徙的涉禽和鹅的潜在风援助模式和可预测性

Ornis Svecica Pub Date : 2020-05-02 DOI: 10.34080/OS.V2.21614

T. Piersma, Sjon Van de Sant

{"title":"Pattern and predictability of potential wind assistance for waders and geese migrating from West Africa and the Wadden Sea to Siberia","authors":"T. Piersma, Sjon Van de Sant","doi":"10.34080/OS.V2.21614","DOIUrl":"https://doi.org/10.34080/OS.V2.21614","url":null,"abstract":"We have analysed published wind data from the period 1979–1991 to evaluate to what extent migrating waders and geese might benefit from tailwind assistance when flying at altitudes ranging from ground level up to 5.5 km from West Africa (Banc d’Arguin, Mauritania) to the Wadden Sea (Netherlands, Germany and Denmark) in late April and early May, and from the Wadden Sea to Taymyr Peninsula (central Siberia) in late May and early June. Between West Africa and the Wadden Sea it is usually advantageous to fly high, with an average tailwind of 15 km/h (mean of yearly averages) for those birds flying along the optimal height track. There were large differences between years though, with 36 km/h tailwind (1983) and 2 km/h headwind (1991) as extreme values. The best altitudes for migration were higher along the northwest African coast than over Europe. There was no evidence for consistent seasonal changes in wind favourability, but “bad” years were consistently bad over the whole season. Between the Wadden Sea and the Taymyr Peninsula wind conditions were better still than for the Banc d’Arguin-to-Wadden Sea journey (long term average for flights along optimal height track is 21 km/h tailwind), with the favourable winds found at intermediate altitudes (1.5–3 km). The wind conditions were less variable between years along the Wadden Sea–Taymyr route. We discuss both the limitations of the current analyses and the scope for future work.","PeriodicalId":52418,"journal":{"name":"Ornis Svecica","volume":"42 172","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41259698","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: 3

Dräktvariation hos hannar i skandinaviska populationer av svarthakad buskskvätta Saxicola rubicola 斯堪的纳维亚黑斑灌木种群雄性的服饰变化

Ornis Svecica Pub Date : 2019-12-11 DOI: 10.34080/os.v29.19691

Reino Andersson

{"title":"Dräktvariation hos hannar i skandinaviska populationer av svarthakad buskskvätta Saxicola rubicola","authors":"Reino Andersson","doi":"10.34080/os.v29.19691","DOIUrl":"https://doi.org/10.34080/os.v29.19691","url":null,"abstract":"In western Europe, the European Stonechat Saxicola rubicola, occurs in two subspecies; rubicola, with a large distribution in Europe, and hibernans, mainly distributed on the British Isles. A small population of presumed hibernans birds breed in Norway. However, difficulties in distinguishing hibernans from rubicola at an individual level has led to speculation regarding the origin of the Norwegian birds. There are no clear genetic differences between the subspecies and their plumage appearance can be considered to overlap within parts of the range. To investigate this, I studied the plumage variation among males during the breeding season in the Scandinavian populations of European Stonechats in Sweden, Norway and Denmark. The study is based on photos of 404 males during the period March–May. The presence or absence of six typical hibernans characteristics were registered for each individual. The results show that males with both hibernans and rubicola characteristics occur during the spring in the Scandinavian populations. There was a clear over-representation of males with hibernans characteristics in Norway as compared to Sweden, and to a lower degree also to Denmark. If the expansion of rubicola progresses in Scandinavia, one could expect a larger proportion of rubicola-like males in the Norwegian population.","PeriodicalId":52418,"journal":{"name":"Ornis Svecica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47672302","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

Mew Gull Larus canus breeding in a residential area of Malmö, Sweden 在瑞典Malmö居民区繁殖的新海鸥

Ornis Svecica Pub Date : 2019-11-12 DOI: 10.34080/os.v29.19924

César Lautaro Chávez Villavicencio, María Fernanda Márquez Bahamonde

引用次数: 0

Nesting of Eurasian Tree Sparrow Passer montanus in a nest of Red Kite Milvus milvus 欧亚麻雀在红鸢巢中的筑巢

Ornis Svecica Pub Date : 2019-11-12 DOI: 10.34080/os.v29.20022

Klaudia Litwiniak, Marcin Przymencki

引用次数: 0

Return rates of nest-box breeding Pied Flycatchers Ficedula hypoleuca to their breeding site in subalpine birch forest in Swedish Lapland, during 1965–2018 1965年至2018年，瑞典拉普兰亚高山桦树林中巢箱繁殖的花叶捕蝇草的繁殖地回报率

Ornis Svecica Pub Date : 2019-10-31 DOI: 10.34080/os.v29.20019

N. Nyholm

引用次数: 1

Resultat av 20 års holkstudier – främst rörande svartvit flugsnappare Ficedula hypoleuca 20年的皮套研究结果——主要是对黑蝇和白蝇的研究

Ornis Svecica Pub Date : 2019-10-31 DOI: 10.34080/os.v18.20235

Jan-Eric Nilsson

引用次数: 2

Collision with power lines and electrocutions in birds — an analysis based on Swedish ringing recoveries 1990–2017 与电线的碰撞和鸟类的触电——基于1990年至2017年瑞典铃声恢复的分析

Ornis Svecica Pub Date : 2019-07-10 DOI: 10.34080/OS.V29.19731

T. Fransson, Lina Jansson, Tuomo Kolehmainen, T. Wenninger

{"title":"Collision with power lines and electrocutions in birds — an analysis based on Swedish ringing recoveries 1990–2017","authors":"T. Fransson, Lina Jansson, Tuomo Kolehmainen, T. Wenninger","doi":"10.34080/OS.V29.19731","DOIUrl":"https://doi.org/10.34080/OS.V29.19731","url":null,"abstract":"Recoveries of birds ringed in Sweden from the period 1990–2017 were used to analyse the occurrence of collisions with power lines and electrocutions. Out of more than 10,000 recoveries of birds found dead with finding circumstances mentioned, 8.6% was associated with power line constructions. The number of species involved was 51 and high proportions were especially evident in some species of owls and raptors. The overall proportion of recoveries caused by collision / electrocution shows a significant decrease over time. A decrease over time in the proportions of electrocution and collision was also evident when analysing finding circumstances in four species where corpses were sent to the Swedish Museum of Natural History. Information about the power line system in Sweden during the period 2007–2016 shows that the length of local power lines has decreased with about 21% during a ten-year period and that underground cables have increased with 28% during the same period. The results show that collisions with power lines have decreased more than electrocutions and this may imply that there are still many places where birds are at risk of being electrocuted.","PeriodicalId":52418,"journal":{"name":"Ornis Svecica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42046323","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: 4

Breeding prerequisites for Ortolan Bunting Emberiza hortulana in Swedish farmland with special focus on foraging 圃鹀在瑞典农田的繁殖条件，特别注重觅食

Ornis Svecica Pub Date : 2019-05-11 DOI: 10.34080/OS.V29.19554

J. Sondell, C. Durà, M. Persson

{"title":"Breeding prerequisites for Ortolan Bunting Emberiza hortulana in Swedish farmland with special focus on foraging","authors":"J. Sondell, C. Durà, M. Persson","doi":"10.34080/OS.V29.19554","DOIUrl":"https://doi.org/10.34080/OS.V29.19554","url":null,"abstract":"Ortolan Buntings Emberiza hortulana are rapidly decreasing in Sweden. Changes in agricultural practices are the main reason. Landscape simplification due to the removal of semi-natural elements leads to a lack of breeding habitats. Furthermore, due to intensive artificial fertiliser applications and advanced agricultural equipment and technology, crops grow both taller and denser than 50 years ago. In Kvismaren, south central Sweden, Ortolan Buntings have been studied since 2009. Here, we focus on one question: what defines a good foraging microhabitat? In 2017, nesting areas for five females and four males were identified and we did 271 feeding observations. Average foraging distance at different nests varied between 47 and 114 meters. About 70% of the foraging activities took place within crop fields. Ortolans utilized mainly unsown rows, later to be used by tractors for spraying etc. and patchy parts of standing crops. Invertebrates extracted from those areas looked dark, suggestive of ground-dwelling species. Our key management recommendation to create better microhabitats for feeding can be easily achieved by most farmers: to leave two unsown sowing rows (amounting to 0.38 m in width) for each tractor wheel to follow.","PeriodicalId":52418,"journal":{"name":"Ornis Svecica","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42087780","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: 2

Populationsutveckling hos svarthakad buskskvätta Saxicola rubicola under expansionens inledningsskede i Västsverige 瑞典西部扩张初期生活在黑齿灌木中的红腹蛛种群发展

Ornis Svecica Pub Date : 2019-05-11 DOI: 10.34080/OS.V29.19555

Reino Andersson

引用次数: 6