Pub Date : 2023-01-01DOI: 10.5751/jfo-00206-940109
Alexandra M Israel, Sue M Hayes, Brendan Boyd, B. Stutchbury
{"title":"Effects of nest concealment on nest predation and cowbird parasitism, flight initiation distance and female stress levels in the Wood Thrush","authors":"Alexandra M Israel, Sue M Hayes, Brendan Boyd, B. Stutchbury","doi":"10.5751/jfo-00206-940109","DOIUrl":"https://doi.org/10.5751/jfo-00206-940109","url":null,"abstract":"","PeriodicalId":15785,"journal":{"name":"Journal of Field Ornithology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71042813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.5751/jfo-00248-940204
Mauricio Díaz-Vallejo, Sergio Chaparro-Herrera, Andrea Lopera-Salazar, Michael Castaño-Díaz, Rodolfo Correa, J. L. Parra
{"title":"Use of acoustic monitoring to estimate occupancy of the Antioquia Brushfinch ( Atlapetes blancae ), a critically endangered species, in San Pedro de los Milagros, Antioquia","authors":"Mauricio Díaz-Vallejo, Sergio Chaparro-Herrera, Andrea Lopera-Salazar, Michael Castaño-Díaz, Rodolfo Correa, J. L. Parra","doi":"10.5751/jfo-00248-940204","DOIUrl":"https://doi.org/10.5751/jfo-00248-940204","url":null,"abstract":"","PeriodicalId":15785,"journal":{"name":"Journal of Field Ornithology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71042969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.5751/jfo-00288-940307
Sydney Miller, Jacqueline Schoen, M. Reudink, Sean M. Mahoney
. Animal coloration is an important communication signal that varies among taxa and affects survival and reproduction. Species-specific color is influenced by a variety of factors including phylogeny, predation, sexual selection, light and resource availability, ecological context, and/or species recognition. Tyrant flycatchers are useful to study color evolution because they are the largest family of birds, occur across broad environmental gradients, and although many genera are monomorphic with drab plumage, some are very colorful. Given the complexity of factors involved, the mechanisms influencing plumage color evolution in Tyrant flycatchers likely involve multiple drivers. In the second of our two-part paper on signal evolution in this avian family, we harnessed a large plumage color database of female and male Tyrannidae species (n = 399) to test the relative importance of geography (climate, latitude), ecology (migration behavior, forest cover, diet), and heterospecific proximity on plumage color evolution. From phylogenetically controlled analyses, we found that female color was largely driven by climate and male color was more exaggerated in migratory species. Sexual dichromatism was also affected by climate and diet, and was more pronounced in migratory species, possibly as a result of color loss in females. Pairwise comparisons between heterospecific color differences and geographic distance were generally weak and consistent with expectations under drift
{"title":"Disentangling the mechanisms of signal evolution in Tyrannidae flycatchers, part II: plumage elaboration evolved with migration behavior, but is also affected by diet, climate, and drift","authors":"Sydney Miller, Jacqueline Schoen, M. Reudink, Sean M. Mahoney","doi":"10.5751/jfo-00288-940307","DOIUrl":"https://doi.org/10.5751/jfo-00288-940307","url":null,"abstract":". Animal coloration is an important communication signal that varies among taxa and affects survival and reproduction. Species-specific color is influenced by a variety of factors including phylogeny, predation, sexual selection, light and resource availability, ecological context, and/or species recognition. Tyrant flycatchers are useful to study color evolution because they are the largest family of birds, occur across broad environmental gradients, and although many genera are monomorphic with drab plumage, some are very colorful. Given the complexity of factors involved, the mechanisms influencing plumage color evolution in Tyrant flycatchers likely involve multiple drivers. In the second of our two-part paper on signal evolution in this avian family, we harnessed a large plumage color database of female and male Tyrannidae species (n = 399) to test the relative importance of geography (climate, latitude), ecology (migration behavior, forest cover, diet), and heterospecific proximity on plumage color evolution. From phylogenetically controlled analyses, we found that female color was largely driven by climate and male color was more exaggerated in migratory species. Sexual dichromatism was also affected by climate and diet, and was more pronounced in migratory species, possibly as a result of color loss in females. Pairwise comparisons between heterospecific color differences and geographic distance were generally weak and consistent with expectations under drift","PeriodicalId":15785,"journal":{"name":"Journal of Field Ornithology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71043035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.5751/jfo-00370-940408
Emma DeLeon, Michael Hook, Michael Small, Amy Tegeler
We examined the use of autonomous recording units for monitoring Northern Bobwhite (Colinus virginianus) in South Carolina and compared results with those of traditional point count surveys conducted simultaneously at overlapping points. We assessed seasonal patterns and quail encounter rates for traditional and recorded surveys and used random forest modeling to determine which location and survey-based variables are most important. We found both survey methods have similar encounter rates, but seasonal occupancy rates are significantly higher when the more extensive automated recording data are used. Both survey methods indicate that location-based variables are most important to encounter rate, and both adequately account for survey detectability, but the use of recordings reduces survey bias. The autonomous recording method also permits an increase in survey and season length without increasing the labor necessary for monitoring. Both survey methods indicate a peak encounter rate in June consistent with the current protocols and with similar studies in nearby regions. The use of recordings, however, allows for extensive tracking of seasonal patterns and would be beneficial for long-term monitoring. Overall, traditional methods are more conducive to abundance surveys, whereas recordings are more appropriate for occupancy or encounter rate studies. We suggest a combination of both point count and autonomous recording methods as a feasible way to expand and improve monitoring of bobwhite populations.
{"title":"Comparing and combining use of autonomous recording units and traditional counts to monitor Northern Bobwhite","authors":"Emma DeLeon, Michael Hook, Michael Small, Amy Tegeler","doi":"10.5751/jfo-00370-940408","DOIUrl":"https://doi.org/10.5751/jfo-00370-940408","url":null,"abstract":"We examined the use of autonomous recording units for monitoring Northern Bobwhite (<em>Colinus virginianus</em>) in South Carolina and compared results with those of traditional point count surveys conducted simultaneously at overlapping points. We assessed seasonal patterns and quail encounter rates for traditional and recorded surveys and used random forest modeling to determine which location and survey-based variables are most important. We found both survey methods have similar encounter rates, but seasonal occupancy rates are significantly higher when the more extensive automated recording data are used. Both survey methods indicate that location-based variables are most important to encounter rate, and both adequately account for survey detectability, but the use of recordings reduces survey bias. The autonomous recording method also permits an increase in survey and season length without increasing the labor necessary for monitoring. Both survey methods indicate a peak encounter rate in June consistent with the current protocols and with similar studies in nearby regions. The use of recordings, however, allows for extensive tracking of seasonal patterns and would be beneficial for long-term monitoring. Overall, traditional methods are more conducive to abundance surveys, whereas recordings are more appropriate for occupancy or encounter rate studies. We suggest a combination of both point count and autonomous recording methods as a feasible way to expand and improve monitoring of bobwhite populations.","PeriodicalId":15785,"journal":{"name":"Journal of Field Ornithology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135609846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.5751/jfo-00379-940406
D. Julian Tattoni, Katie LaBarbera
Mist-nets are one of the most important tools for the capture of wild birds in ornithological research. The probability of capturing birds may vary by net height, which may drive capture biases. Such biases are rarely estimated, likely because of the relatively high cost and effort associated with constructing and operating elevated mist-net rigs where multiple mist-nets are stacked above one another. Therefore, a low-cost and -effort method to collect capture height data may allow broader investigation and better accounting of potential bias in existing banding protocols. Here, we investigate whether recording net panel of capture (with net panels indicating capture height, e.g., “upper panel”) in ground-level mist-nets provides sufficient information to estimate capture height biases and compare these estimations to those obtained with traditional elevated mist-net rigs. Of 29 taxa analyzed, we detected elevated capture biases for 11 (37.9%) and ground-level capture biases for seven (24.1%). When compared to estimates derived from elevated mist-net rigs at the same study site, we found high agreement with ground-level biases (75.0%) and low agreement with elevated biases (23.1%). These results suggest panel height of ground-level nets is a reliable method to estimate ground-level biases; however, scale of sampling may influence elevated biases, particularly for species that center their activity at the mid-story. Recording panel height may be quickly integrated into a station’s processing protocols and broader application may improve our understanding of these biases.
{"title":"A simple method to estimate capture height biases at landbird banding stations: opportunities and limitations","authors":"D. Julian Tattoni, Katie LaBarbera","doi":"10.5751/jfo-00379-940406","DOIUrl":"https://doi.org/10.5751/jfo-00379-940406","url":null,"abstract":"Mist-nets are one of the most important tools for the capture of wild birds in ornithological research. The probability of capturing birds may vary by net height, which may drive capture biases. Such biases are rarely estimated, likely because of the relatively high cost and effort associated with constructing and operating elevated mist-net rigs where multiple mist-nets are stacked above one another. Therefore, a low-cost and -effort method to collect capture height data may allow broader investigation and better accounting of potential bias in existing banding protocols. Here, we investigate whether recording net panel of capture (with net panels indicating capture height, e.g., “upper panel”) in ground-level mist-nets provides sufficient information to estimate capture height biases and compare these estimations to those obtained with traditional elevated mist-net rigs. Of 29 taxa analyzed, we detected elevated capture biases for 11 (37.9%) and ground-level capture biases for seven (24.1%). When compared to estimates derived from elevated mist-net rigs at the same study site, we found high agreement with ground-level biases (75.0%) and low agreement with elevated biases (23.1%). These results suggest panel height of ground-level nets is a reliable method to estimate ground-level biases; however, scale of sampling may influence elevated biases, particularly for species that center their activity at the mid-story. Recording panel height may be quickly integrated into a station’s processing protocols and broader application may improve our understanding of these biases.","PeriodicalId":15785,"journal":{"name":"Journal of Field Ornithology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135507200","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.5751/jfo-00254-940112
Ewan H. Stenhouse, P. Bellamy, I. Vaughan, W. Kirby, W. Symondson, P. Orozco‐Terwengel
{"title":"Using DNA metabarcoding to explore spatial variation in diet across European Hawfinch populations","authors":"Ewan H. Stenhouse, P. Bellamy, I. Vaughan, W. Kirby, W. Symondson, P. Orozco‐Terwengel","doi":"10.5751/jfo-00254-940112","DOIUrl":"https://doi.org/10.5751/jfo-00254-940112","url":null,"abstract":"","PeriodicalId":15785,"journal":{"name":"Journal of Field Ornithology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71043087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.5751/jfo-00210-940104
Gabrielle Robineau-Charette, Darroch Whitaker, I. Warkentin
{"title":"Change in altitudinal distribution of Newfoundland Gray-cheeked Thrush ( Catharus minimus minimus ) revealed through historical stop-level breeding bird survey data","authors":"Gabrielle Robineau-Charette, Darroch Whitaker, I. Warkentin","doi":"10.5751/jfo-00210-940104","DOIUrl":"https://doi.org/10.5751/jfo-00210-940104","url":null,"abstract":"","PeriodicalId":15785,"journal":{"name":"Journal of Field Ornithology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71042915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.5751/jfo-00293-940308
Kristina L. Cockle, Olga Villalba, Nestor Fariña, A. Bodrati, L. Pagano, Eliza D Stein, Andrea R Norris
Long-distance migratory aerial insectivores are among the most threatened groups of birds breeding in North America, yet little is published about the two-thirds of their annual cycle that unfolds in South America. To study non-breeding ecology and migration of the Common Nighthawk (Chordeiles minor), we observed, captured, and GPS-tagged individuals at Reserva Natural Rincón de Santa María, an Important Bird Area on the Paraná River in Corrientes, Argentina, from 2017 to 2022 (237 captures, 95 individuals, 556 GPS fixes from 8 females). Common Nighthawks arrived at the reserve (late November to mid-January) partway through flight feather molt; primaries 8, 9, and 10 molted consecutively until early February, followed by body feathers. Three tagged females spent December/January to March at the reserve, May to August in Florida (USA), and October/November to December/ January in the Cerrado (Brazil), and at least one traveled 1800 km while molting P8. Recapture rates across seasons were 44% for females and 25% for males. Small body size and breeding locations in Florida are consistent with the chapmani subspecies previously recorded from Argentina. Direct observations and GPS tracking (8 individuals) revealed that nighthawks roosted during the day in mature exotic pines; foraged over pines and native grasslands for 26–41 min within ~40 min after sunset, nearly always in silence; and rested for the remainder of the night in native grasslands, on roads, or on rocky platforms. Common Nighthawks should be included among the growing number of migratory species that exhibit long-distance movements between stationary sites during their long nonbreeding period. Our results also suggest site fidelity to non-breeding areas, a continuous molt-migration strategy, and some nuanced migratory connectivity. Programs aiming to conserve long-distance migratory aerial insectivores should support long-term monitoring led from the Global South, especially in the Cerrado and southern South America. Please see Appendix 1 for a Spanish translation of this article. RESUMEN. Los insectívoros aéreos migratorios de larga distancia se encuentran entre los grupos de aves más amenazados que se reproducen en Norteamérica, sin embargo, poco se ha publicado sobre los dos tercios de su ciclo anual que se desarrolla en Sudamérica. Para estudiar la ecología no reproductiva y la migración del Añapero Boreal (Chordeiles minor), observamos, capturamos y marcamos con GPS individuos en la Reserva Natural Rincón de Santa María, un Área Importante para la Conservación de las Aves sobre el río Paraná en Corrientes, Argentina, desde 2017 hasta 2022 (237 capturas, 95 individuos, 556 GPS fijos de 8 hembras). Los Chordeiles minor llegaron a la reserva (finales de noviembre a mediados de enero) a mitad de la muda de las plumas de vuelo; las primarias 8, 9 y 10 mudaron consecutivamente hasta principios de febrero, seguidas de las plumas del cuerpo. Tres hembras marcadas pasaron de diciembre/enero
长途迁徙的空中食虫动物是在北美繁殖的最受威胁的鸟类群体之一，但关于它们在南美洲展开的三分之二的年度周期的报道很少。为了研究普通夜鹰(Chordeiles minor)的非繁殖生态和迁徙，我们于2017年至2022年在阿根廷Corrientes paran河上的重要鸟类保护区Rincón de Santa María观察、捕获和标记了普通夜鹰的个体(237只捕获，95只，8只雌性的556个GPS固定)。普通夜鹰在飞羽蜕皮的中途到达保护区(11月下旬至1月中旬);初生8、9和10期连续蜕皮，直到二月初，接着是体毛。3只被标记的雌性在保护区度过了12月/ 1月至3月，5月至8月在佛罗里达州(美国)，10月/ 11月至12月/ 1月在塞拉多(巴西)，至少有一只在P8换毛期间旅行了1800公里。不同季节的重获率分别为44%和25%。佛罗里达的小体型和繁殖地点与之前在阿根廷记录的查马尼亚种一致。直接观测和GPS追踪(8只)表明，夜鹰白天栖息在成熟的外来松树上;在日落后~40 min的时间内，在松林和天然草地上进行26 ~ 41 min的采集，几乎都是静默的;晚上剩下的时间，他们在草原上、公路上或岩石平台上休息。普通夜鹰应该被包括在越来越多的候鸟中，它们在漫长的非繁殖期表现出在固定地点之间的长距离移动。我们的研究结果还表明，对非繁殖区的地点保真度，持续的换毛迁移策略，以及一些微妙的迁徙连通性。旨在保护长途迁徙的空中食虫动物的计划应该支持由全球南方主导的长期监测，特别是在塞拉多和南美洲南部。请参阅附录1获取本文的西班牙语翻译。RESUMEN。Los insectívoros远距离移徙和长距离移徙的汇汇处，请输入汇汇处的汇汇处，请输入汇汇处的汇汇处，más汇汇处的汇汇处，汇汇处的汇汇处，汇汇处的汇汇处，汇汇处的汇汇处，汇汇处的汇汇处，汇汇处的汇汇处，汇汇处的汇汇处，汇汇处的汇汇处，汇汇处的汇汇处，汇汇处的汇汇处，汇汇处的汇汇处，汇汇处的汇汇处，汇汇处的汇汇处。Para estudiar la ecología no reproductiva y la migración del Añapero Boreal (Chordeiles minor)， observamos, capturamos y marcamos con GPS individuos en la Reserva Natural Rincón de Santa María, un Área Importante Para la Conservación de las Aves sobre el río paran en Corrientes，阿根廷，desde 2017 hasta 2022(237个捕获，95个个体，556个GPS fijos de 8个embras)。未成年人的法律储备(11月结束)和未成年人的法律储备(11月结束);8月、9月和10月的第一次预选是连续的2月原则，第一次预选是连续的2月原则，第一次预选是连续的。3月1日/ 11月1日/ 10月1日/ 11月1日/ 10月1日/ 10月1日/ 10月1日/ 10月1日/ 10月1日/ 10月1日/ 10月1日/ 10月1日/ 10月1日/ 10月1日/ 10月1日/ 10月1日Las tasas de recaptura entre estaciones fueron del 44% para Las hembras y del 25% para los machos。El pequeño tamaño下士las localidades de cría在佛罗里达征服了con la subespecie chapmani registrada previente在阿根廷。通过GPS(8个个体)直接观测到的数据揭示了los C. minor se posaban durante el día en pinos exóticos maduros;在联合国广场上，人们可以在26-41分钟的时间里，在40分钟的时间里，在广场上，人们可以在安静的时间里，在广场上，人们可以在安静的时间里，在广场上，人们可以在安静的时间里，在广场上。y descansaban el饭馆de la noche en pastizales nativos, en carreteras o en plataformas rocosas。小Chordeiles debería包括entre el creciente número de species migratoras que muestran movimitos de large distance entre lugares estacionario durante su large periodo no reproductor。新结果表明，在没有繁殖的情况下，在没有繁殖的情况下，在没有繁殖的情况下，在没有繁殖的情况下，在没有繁殖的情况下，在连续的情况下，在连续的情况下，在迁移的情况下。Los方案的目的地和保守的Los insectívoros远距离的移徙和长距离的移徙deberían在全球范围内，特别是在塞拉多和苏丹的长距离的移徙和长距离的移徙。
{"title":"Non-breeding ecology of a Neotropical-Nearctic migrant, the Common Nighthawk ( Chordeiles minor ): habitat, activity patterns, molt, and migration","authors":"Kristina L. Cockle, Olga Villalba, Nestor Fariña, A. Bodrati, L. Pagano, Eliza D Stein, Andrea R Norris","doi":"10.5751/jfo-00293-940308","DOIUrl":"https://doi.org/10.5751/jfo-00293-940308","url":null,"abstract":"Long-distance migratory aerial insectivores are among the most threatened groups of birds breeding in North America, yet little is published about the two-thirds of their annual cycle that unfolds in South America. To study non-breeding ecology and migration of the Common Nighthawk (Chordeiles minor), we observed, captured, and GPS-tagged individuals at Reserva Natural Rincón de Santa María, an Important Bird Area on the Paraná River in Corrientes, Argentina, from 2017 to 2022 (237 captures, 95 individuals, 556 GPS fixes from 8 females). Common Nighthawks arrived at the reserve (late November to mid-January) partway through flight feather molt; primaries 8, 9, and 10 molted consecutively until early February, followed by body feathers. Three tagged females spent December/January to March at the reserve, May to August in Florida (USA), and October/November to December/ January in the Cerrado (Brazil), and at least one traveled 1800 km while molting P8. Recapture rates across seasons were 44% for females and 25% for males. Small body size and breeding locations in Florida are consistent with the chapmani subspecies previously recorded from Argentina. Direct observations and GPS tracking (8 individuals) revealed that nighthawks roosted during the day in mature exotic pines; foraged over pines and native grasslands for 26–41 min within ~40 min after sunset, nearly always in silence; and rested for the remainder of the night in native grasslands, on roads, or on rocky platforms. Common Nighthawks should be included among the growing number of migratory species that exhibit long-distance movements between stationary sites during their long nonbreeding period. Our results also suggest site fidelity to non-breeding areas, a continuous molt-migration strategy, and some nuanced migratory connectivity. Programs aiming to conserve long-distance migratory aerial insectivores should support long-term monitoring led from the Global South, especially in the Cerrado and southern South America. Please see Appendix 1 for a Spanish translation of this article. RESUMEN. Los insectívoros aéreos migratorios de larga distancia se encuentran entre los grupos de aves más amenazados que se reproducen en Norteamérica, sin embargo, poco se ha publicado sobre los dos tercios de su ciclo anual que se desarrolla en Sudamérica. Para estudiar la ecología no reproductiva y la migración del Añapero Boreal (Chordeiles minor), observamos, capturamos y marcamos con GPS individuos en la Reserva Natural Rincón de Santa María, un Área Importante para la Conservación de las Aves sobre el río Paraná en Corrientes, Argentina, desde 2017 hasta 2022 (237 capturas, 95 individuos, 556 GPS fijos de 8 hembras). Los Chordeiles minor llegaron a la reserva (finales de noviembre a mediados de enero) a mitad de la muda de las plumas de vuelo; las primarias 8, 9 y 10 mudaron consecutivamente hasta principios de febrero, seguidas de las plumas del cuerpo. Tres hembras marcadas pasaron de diciembre/enero","PeriodicalId":15785,"journal":{"name":"Journal of Field Ornithology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71043045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.5751/jfo-00260-940306
Jacqueline Schoen, Sydney Miller, M. Reudink, Quinn Jennings, Sean M. Mahoney
. Acoustic signals mediate key animal interactions and can evolve through a variety of factors. Signal divergence can reinforce pre-zygotic barriers and minimize costly hybridizations among closely related species or partition acoustic space to avoid signal interference. To unravel the drivers of song evolution, it is critical to simultaneously test multiple evolutionary axes leading to heterospecific song variation (e
{"title":"Disentangling the mechanisms of signal evolution in Tyrannidae flycatchers, part I: song is constrained by morphology and covaries with ecological factors","authors":"Jacqueline Schoen, Sydney Miller, M. Reudink, Quinn Jennings, Sean M. Mahoney","doi":"10.5751/jfo-00260-940306","DOIUrl":"https://doi.org/10.5751/jfo-00260-940306","url":null,"abstract":". Acoustic signals mediate key animal interactions and can evolve through a variety of factors. Signal divergence can reinforce pre-zygotic barriers and minimize costly hybridizations among closely related species or partition acoustic space to avoid signal interference. To unravel the drivers of song evolution, it is critical to simultaneously test multiple evolutionary axes leading to heterospecific song variation (e","PeriodicalId":15785,"journal":{"name":"Journal of Field Ornithology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71043184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.5751/jfo-00307-940301
Miguel A. Mejías, David Wilson
. Avian island endemics are prone to extinction, and the preservation of remaining taxa requires long-term studies of their natural history and threats to survival. Thus, we provide, for the first time, a detailed account of the breeding biology and nesting threats of an endemic subspecies of vireonid, the non-migratory Bermuda White-eyed Vireo ( Vireo griseus bermudianus ). From 2016– 2021, we located 84 nests, collected breeding data associated with 47 breeding pairs, and conducted observations throughout the nesting cycle. Some breeding pairs remained together for up to four successive breeding seasons. Bermuda Vireos began building nests in late February and cared for fledglings until mid-August. Both sexes contributed to all nesting stages, which were similar in duration to those of other vireo species ( N , mean ± standard deviation): nest building (13 nests, 6 ± 3 d), incubation (11 nests, 14 ± 2 d), nestling care (6 nests, 11 ± 2 d), and fledgling care (5 nests, 41 ± 12 d). Nests, eggs, and nestlings were all vireonine in structure and appearance; nests were found in 14 tree species (2 endemic, 2 native, and 10 introduced). Across six years, 25 of the 42 nests (60%) with eggs
{"title":"Breeding biology and nesting behavior of the endemic subspecies of White-eyed Vireo ( Vireo griseus bermudianus ) on the Bermuda archipelago","authors":"Miguel A. Mejías, David Wilson","doi":"10.5751/jfo-00307-940301","DOIUrl":"https://doi.org/10.5751/jfo-00307-940301","url":null,"abstract":". Avian island endemics are prone to extinction, and the preservation of remaining taxa requires long-term studies of their natural history and threats to survival. Thus, we provide, for the first time, a detailed account of the breeding biology and nesting threats of an endemic subspecies of vireonid, the non-migratory Bermuda White-eyed Vireo ( Vireo griseus bermudianus ). From 2016– 2021, we located 84 nests, collected breeding data associated with 47 breeding pairs, and conducted observations throughout the nesting cycle. Some breeding pairs remained together for up to four successive breeding seasons. Bermuda Vireos began building nests in late February and cared for fledglings until mid-August. Both sexes contributed to all nesting stages, which were similar in duration to those of other vireo species ( N , mean ± standard deviation): nest building (13 nests, 6 ± 3 d), incubation (11 nests, 14 ± 2 d), nestling care (6 nests, 11 ± 2 d), and fledgling care (5 nests, 41 ± 12 d). Nests, eggs, and nestlings were all vireonine in structure and appearance; nests were found in 14 tree species (2 endemic, 2 native, and 10 introduced). Across six years, 25 of the 42 nests (60%) with eggs","PeriodicalId":15785,"journal":{"name":"Journal of Field Ornithology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71043554","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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