A. Bergner, Christer Elderud, Kent E. Person, L. Gezelius
The autumn migration of Jack Snipe Lymnocryptes minimus was studied using mist-netting at night along a muddy shoreline at Lake Tåkern in southern central Sweden. During ten consecutive autumn seasons ranging from mid-September to mid-November a total of 107 birds were captured, particularly within the first two hours after dusk. The peak of migration occurred in the first ten days of October with the juvenile birds on average passing a few days earlier than the adult birds. We present information on movements and ringing recoveries and review the challenges of ageing the species. We propose that crepuscular mist-netting near wetlands offering important staging grounds may be a suitable method to monitor the migratory movements, and possibly the population dynamics, of this little-studied species.
{"title":"Autumn migration of Jack Snipe Lymnocryptes minimus in southern Sweden: results from ten years of crepuscular ringing","authors":"A. Bergner, Christer Elderud, Kent E. Person, L. Gezelius","doi":"10.34080/os.v31.22319","DOIUrl":"https://doi.org/10.34080/os.v31.22319","url":null,"abstract":"The autumn migration of Jack Snipe Lymnocryptes minimus was studied using mist-netting at night along a muddy shoreline at Lake Tåkern in southern central Sweden. During ten consecutive autumn seasons ranging from mid-September to mid-November a total of 107 birds were captured, particularly within the first two hours after dusk. The peak of migration occurred in the first ten days of October with the juvenile birds on average passing a few days earlier than the adult birds. We present information on movements and ringing recoveries and review the challenges of ageing the species. We propose that crepuscular mist-netting near wetlands offering important staging grounds may be a suitable method to monitor the migratory movements, and possibly the population dynamics, of this little-studied species.","PeriodicalId":52418,"journal":{"name":"Ornis Svecica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69763061","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}
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.
我们分析了1979-1991年期间公布的风力数据，以评估4月下旬和5月初从西非(毛里塔尼亚的阿古因岛)到瓦登海(荷兰、德国和丹麦)，以及5月下旬和6月初从瓦登海到泰米尔半岛(西伯利亚中部)，迁徙的水禽和鹅在从地面到5.5公里的高度上飞行时，在多大程度上受益于顺风的帮助。在西非和瓦登海之间，飞得高通常是有利的，对于那些沿着最佳高度轨道飞行的鸟来说，平均顺风为每小时15公里(年平均值)。然而，年份之间存在很大差异，极值为36公里/小时的顺风(1983年)和2公里/小时的逆风(1991年)。最适合移民的海拔高度是非洲西北海岸，而不是欧洲。没有证据表明风有利度有持续的季节变化，但“坏”年份在整个季节都一直不好。在瓦登海和泰米尔半岛之间的风力条件仍然比Banc d ' arguin到瓦登海的旅程好(沿着最佳高度轨道飞行的长期平均值为21公里/小时的顺风)，在中等高度(1.5-3公里)发现有利的风。瓦登海-泰米尔航线上的风况在不同年份之间变化较小。我们讨论了当前分析的局限性和未来工作的范围。
{"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":null,"pages":null},"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}
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.
{"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":null,"pages":null},"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}
César Lautaro Chávez Villavicencio, María Fernanda Márquez Bahamonde
The Mew Gull Larus canus is both a coastal and inland breeder and can be found on many different substrates, including man-made structures. It is known since long to nest in urban areas of Sweden, but neither the number of urban breeding pairs nor their behaviour have been well documented. We made some observations of breeding Mew Gulls in the city of Malmö in south Sweden and asked the chair of the tenant owners’ association that comprised one of the buildings with Mew Gull nest about the tenants’ experience of the species. Some perceive Mew Gulls as harmful because they dirty the roofs, leave a bad smell, are noisy, and defend their young with aggressive behaviours. Given the often-conflicting interests of gulls and humans, a better documentation of the nesting population in urban areas of Sweden, as well as their behaviour and interaction with people, is called for.
{"title":"Mew Gull Larus canus breeding in a residential area of Malmö, Sweden","authors":"César Lautaro Chávez Villavicencio, María Fernanda Márquez Bahamonde","doi":"10.34080/os.v29.19924","DOIUrl":"https://doi.org/10.34080/os.v29.19924","url":null,"abstract":"The Mew Gull Larus canus is both a coastal and inland breeder and can be found on many different substrates, including man-made structures. It is known since long to nest in urban areas of Sweden, but neither the number of urban breeding pairs nor their behaviour have been well documented. We made some observations of breeding Mew Gulls in the city of Malmö in south Sweden and asked the chair of the tenant owners’ association that comprised one of the buildings with Mew Gull nest about the tenants’ experience of the species. Some perceive Mew Gulls as harmful because they dirty the roofs, leave a bad smell, are noisy, and defend their young with aggressive behaviours. Given the often-conflicting interests of gulls and humans, a better documentation of the nesting population in urban areas of Sweden, as well as their behaviour and interaction with people, is called for.","PeriodicalId":52418,"journal":{"name":"Ornis Svecica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48747607","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}
In June 2019 we found a nest of Eurasian Tree Sparrow Passer montanus in a nest of Red Kite Milvus milvus. It contained five chicks and was located on the side of the kite nest. The nests were located 17 m above ground in a pine tree in a small pine woodland within farmland in western Poland. We believe that this is the first record of Eurasian Tree Sparrow breeding in a Red Kite nest. Our observation supports the notion of great adaptability and flexibility in selection of nest site reported by other authors, who have found Eurasian Tree Sparrow nest in large twig nests of several species.
{"title":"Nesting of Eurasian Tree Sparrow Passer montanus in a nest of Red Kite Milvus milvus","authors":"Klaudia Litwiniak, Marcin Przymencki","doi":"10.34080/os.v29.20022","DOIUrl":"https://doi.org/10.34080/os.v29.20022","url":null,"abstract":"In June 2019 we found a nest of Eurasian Tree Sparrow Passer montanus in a nest of Red Kite Milvus milvus. It contained five chicks and was located on the side of the kite nest. The nests were located 17 m above ground in a pine tree in a small pine woodland within farmland in western Poland. We believe that this is the first record of Eurasian Tree Sparrow breeding in a Red Kite nest. Our observation supports the notion of great adaptability and flexibility in selection of nest site reported by other authors, who have found Eurasian Tree Sparrow nest in large twig nests of several species.","PeriodicalId":52418,"journal":{"name":"Ornis Svecica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41408151","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}
Return rates of 4,178 female and 1,565 male breeding Pied Flycatchers ringed in 1965–2017 were studied near the species’ upper elevation and climatic limit in northern Sweden. Female return rate was 7.5% in the season subsequent to the first breeding season. Having returned once, 37% continued to return the next three seasons. Corresponding return rates of males were 27% and 39%. Female return rate decreased with more than 30% during the study period whereas that of males did not decrease. This difference was probably due to increased mortality during the non-breeding season that selectively struck females after the 1970s. Local factors affected return rates in both sexes. Return rate was positively correlated with breeding success in females but negatively in males, whereas it was correlated with nest-predation in the opposite way. Predation by mustelids accounted for a significant part of female return rate. Females that had returned once were continuously faithful to the former breeding site. Males showed faithfulness only after having returned twice.
{"title":"Return rates of nest-box breeding Pied Flycatchers Ficedula hypoleuca to their breeding site in subalpine birch forest in Swedish Lapland, during 1965–2018","authors":"N. Nyholm","doi":"10.34080/os.v29.20019","DOIUrl":"https://doi.org/10.34080/os.v29.20019","url":null,"abstract":"Return rates of 4,178 female and 1,565 male breeding Pied Flycatchers ringed in 1965–2017 were studied near the species’ upper elevation and climatic limit in northern Sweden. Female return rate was 7.5% in the season subsequent to the first breeding season. Having returned once, 37% continued to return the next three seasons. Corresponding return rates of males were 27% and 39%. Female return rate decreased with more than 30% during the study period whereas that of males did not decrease. This difference was probably due to increased mortality during the non-breeding season that selectively struck females after the 1970s. Local factors affected return rates in both sexes. Return rate was positively correlated with breeding success in females but negatively in males, whereas it was correlated with nest-predation in the opposite way. Predation by mustelids accounted for a significant part of female return rate. Females that had returned once were continuously faithful to the former breeding site. Males showed faithfulness only after having returned twice.","PeriodicalId":52418,"journal":{"name":"Ornis Svecica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46359620","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}
{"title":"Resultat av 20 års holkstudier – främst rörande svartvit flugsnappare Ficedula hypoleuca","authors":"Jan-Eric Nilsson","doi":"10.34080/os.v18.20235","DOIUrl":"https://doi.org/10.34080/os.v18.20235","url":null,"abstract":"","PeriodicalId":52418,"journal":{"name":"Ornis Svecica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42172290","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}
T. Fransson, Lina Jansson, Tuomo Kolehmainen, T. Wenninger
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.
{"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":null,"pages":null},"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}
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.
{"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":null,"pages":null},"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}
With its 25 confirmed breeding records between 2000 and 2015, the European Stonechat Saxicola rubicola is historically a rare bird in Sweden. The first breeding in the West Coast was found in 2014. Censuses performed in 2017 and 2018 revealed 28 and 30 breedings respectively. Out of 83 investigated territories, most were found in coastal heathlands in Halland. The arrival occurred in the turn of the months March/April and the majority of the males consisted of one year old birds (2CY). Fledgling date for 68 clutches were distributed from May to August. Second clutches were observed for ten out of 32 investigated breedings. The Swedish expansion should be seen in the context of Danish immigration in combination with a large-scale advance via the German Schleswig-Holstein area. The European Stonechat belongs to those range-expanding species that are expected to increase according to predictions of the future bird fauna. Due to warmer climate, plenty of appropriate habitats and high probability of reproduction, the conditions are good for a continued range expansion in southern Sweden.
{"title":"Populationsutveckling hos svarthakad buskskvätta Saxicola rubicola under expansionens inledningsskede i Västsverige","authors":"Reino Andersson","doi":"10.34080/OS.V29.19555","DOIUrl":"https://doi.org/10.34080/OS.V29.19555","url":null,"abstract":"With its 25 confirmed breeding records between 2000 and 2015, the European Stonechat Saxicola rubicola is historically a rare bird in Sweden. The first breeding in the West Coast was found in 2014. Censuses performed in 2017 and 2018 revealed 28 and 30 breedings respectively. Out of 83 investigated territories, most were found in coastal heathlands in Halland. The arrival occurred in the turn of the months March/April and the majority of the males consisted of one year old birds (2CY). Fledgling date for 68 clutches were distributed from May to August. Second clutches were observed for ten out of 32 investigated breedings. The Swedish expansion should be seen in the context of Danish immigration in combination with a large-scale advance via the German Schleswig-Holstein area. The European Stonechat belongs to those range-expanding species that are expected to increase according to predictions of the future bird fauna. Due to warmer climate, plenty of appropriate habitats and high probability of reproduction, the conditions are good for a continued range expansion in southern Sweden.","PeriodicalId":52418,"journal":{"name":"Ornis Svecica","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42827396","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}
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