Journal of Field Ornithology最新文献

{"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":"10 1","pages":"0"},"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}

{"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":"18 1","pages":"0"},"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}

{"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":"1 1","pages":""},"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}

{"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":"1 1","pages":""},"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}

{"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":"1 1","pages":""},"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}

{"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":"1 1","pages":""},"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}

{"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":"1 1","pages":""},"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}

{"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":"1 1","pages":""},"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}

{"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":"1 1","pages":""},"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}

{"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":"1 1","pages":""},"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}