Journal of Field Ornithology最新文献

{"title":"Using automated telemetry to identify population connectivity and migration phenology of Snowy Plovers breeding in the Southern Great Plains","authors":"Kristen M. Heath-Acre,&nbsp;Clint W. Boal,&nbsp;Daniel P. Collins,&nbsp;Warren C. Conway,&nbsp;William P. Johnson","doi":"10.1111/jofo.12393","DOIUrl":"10.1111/jofo.12393","url":null,"abstract":"<div>\u0000 \u0000 <p>Within-breeding season movements have not been quantified for Snowy Plovers (<i>Charadrius nivosus</i>) breeding on the Southern Great Plains (SGP), where suitable breeding habitat can range from less than 10 km to more than 600 km apart. This mosaic distribution of discrete patches of breeding habitat, combined with weather stochasticity and low densities of Snowy Plovers in Texas and New Mexico, increases the risk of local and regional extirpation. Further, little is known about SGP Snowy Plover migration phenology or winter habitat. We used the Motus Wildlife Tracking System to examine population connectivity, migration phenology, and winter habitat locations of adult Snowy Plovers in the SGP. Movements of Snowy Plovers during the 2017 and 2018 breeding seasons suggest little to no connectivity between the Salt Plains National Wildlife Refuge population in Oklahoma and populations in Texas and New Mexico. However, several Snowy Plovers in Texas moved to a lake formed by freshwater springs that may have provided higher-quality breeding and foraging habitat. Migrating primarily at night, we found that Snowy Plovers from a breeding area in Oklahoma made migratory movements to Texas and the Louisiana Gulf Coast. These data may be important to long-term conservation and planning efforts relative to understanding regional persistence and connectivity among breeding populations of Snowy Plovers in the SGP. Our results also highlight the need for future studies of wintering habitats used by SGP Snowy Plovers.</p>\u0000 </div>","PeriodicalId":15785,"journal":{"name":"Journal of Field Ornithology","volume":"92 4","pages":"461-474"},"PeriodicalIF":0.9,"publicationDate":"2022-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47623847","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":"Changes in arthropod communities between breeding stages in nests of Great Tits","authors":"Lisa Furu Baardsen,&nbsp;Erik Matthysen","doi":"10.1111/jofo.12390","DOIUrl":"10.1111/jofo.12390","url":null,"abstract":"<p>The biotic and abiotic environments in bird nests change during the nesting cycle as eggs are laid and incubated and nestlings develop and eventually fledge. Nest-arthropod communities have been studied for many bird species and are commonly sampled after young fledge. However, the population dynamics of arthropods in nests are expected to vary over the nesting cycle as a result of the changing nest environment, in symphony with arthropod life cycles and generation times. Few investigators have examined nest arthropod communities at different stages of the breeding period. We collected nests of Great Tits (<i>Parus major</i>) at the egg stage, nestling stage, and after fledging, and extracted nest arthropods using Berlese funnels and identified them to Primary Taxonomic Groups (PTGs). Total arthropod abundance, as well as abundance of fleas, parasitic mites, and adult predatory beetles, was higher during the nestling stage than after fledging. The abundance of beetle mites decreased from the egg stage to fledging, whereas larval predatory beetles and scavenger flies increased. Thus, our results demonstrate important changes in overall abundance, but also in the trophic structure of nest arthropod communities during the nesting cycle. Our results also suggest that nests collected after fledging may give biased information on the abundance of parasites, or nest-arthropod communities in general, during the nestling stage.</p>","PeriodicalId":15785,"journal":{"name":"Journal of Field Ornithology","volume":"92 4","pages":"518-531"},"PeriodicalIF":0.9,"publicationDate":"2022-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44916830","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":"Replacement of rectrices by wintering White Wagtails: an experiment to examine effects of sex, age, and body condition","authors":"M. Takagi","doi":"10.5751/jfo-00124-930301","DOIUrl":"https://doi.org/10.5751/jfo-00124-930301","url":null,"abstract":". Adventitious replacement is regrowth of accidentally lost feathers outside usual molt periods. To examine the intrinsic factors affecting adventitious replacement, I conducted feather-plucking experiments on White Wagtail ( Motacilla alba lugens ) during the coldest time of the year. I examined sex, age class, and body condition of wagtails as potential factors affecting the ratio of the lengths of regrown rectrices (T4) to their original lengths. I captured and ringed 288 wagtails in January, plucked and measured the length of the right T4, and measured tarsus length and mass. I recaptured 121 of the wagtails approximately 6 weeks later, and plucked and measured their regrown T4s. In a modeling analysis of the ratio of original to fully grown T4, males regrew their T4s to lengths closer to those of their original T4s than did females. Males are presumed to need longer tail feathers than females. Differences in regrowth were not explained by age class. Both adults and yearlings must acquire sufficiently long rectrices for them to achieve full their functionality significance. Individuals in better condition tended to regrow their T4s to lengths closer to those of their original T4s than did individuals in poorer condition. Adventitious replacement may be influenced by body condition in those individuals that finished regrowing their rectrices early. In an analysis of the ratio of original to regrowing T4, the ratio for adults was greater than that for yearlings. Yearlings may be slower than adults to fill the gap left by losing a T4, or juveniles may have begun regrowth of their plucked T4s later than adults. Sex and body condition did not significantly contribute to the model. Because age-class difference in the regrowth speed of T4s might not be influenced by body condition, adventitious replacement is worthy of careful examination in the future in the context of life history strategies. adultos y los juveniles de primer año deben adquirir rectrices suficientemente largas para alcanzar la significancia funcional completa. Individuos en mejores condiciones tendieron a crecer sus T4 a largos más similares que las originales comparado con individuos en peores condiciones. El reemplazo adventicio puede estar influenciado por la condición corporal en aquellos individuos que terminaron el crecimiento de sus rectrices tempranamente. En un análisis de la razón de la longitud de la T4 original y la nueva, la razón de los adultos fue mayor que la de los juveniles. Los juveniles pueden llenar el vacío dejado por la pérdida de la T4 más despacio que los adultos, o los juveniles pueden haber iniciado el crecimiento de las T4 removidas más tarde que los adultos. El sexo y la condición corporal no contribuyeron significativamente en el modelo. Debido a que las diferencias en la velocidad de crecimiento de las T4 por clase etaria pueden no estar influenciado por la condición corporal, es importante la exploración cuidadosa del remplazo adventicio en el futur","PeriodicalId":15785,"journal":{"name":"Journal of Field Ornithology","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71041736","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":"An evaluation of transmitter effects on adult and juvenile Common Terns using leg-loop harness attachments","authors":"Evan J. Buck, Jeffery D. Sullivan, Claire S. Teitelbaum, D. Brinker, P. C. Mcgowan, D. Prosser","doi":"10.5751/jfo-00136-930403","DOIUrl":"https://doi.org/10.5751/jfo-00136-930403","url":null,"abstract":"","PeriodicalId":15785,"journal":{"name":"Journal of Field Ornithology","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71042000","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":"Nest survival and cause-specific nest mortality in the San Clemente Bell’s Sparrow","authors":"Mitchell A. Parsons, Susan T. Meiman, S. A. Muñoz, A. Bridges","doi":"10.5751/jfo-00177-930402","DOIUrl":"https://doi.org/10.5751/jfo-00177-930402","url":null,"abstract":". Nest monitoring and the use of camera systems can provide researchers with reproductive data integral to the successful management and recovery of threatened and endangered avian species. From 2012 to 2019, we used cameras to monitor 110 nests of the threatened San Clemente Bell’s Sparrow ( Artemisiospiza belli clementeae ) to identify nest predators and evaluate threats to their recovery on San Clemente Island (SCI). We evaluated the effects of winter precipitation, nest initiation date, and nest substrate on nest survival rates. We also used cameras to identify and estimate cause-specific mortality rates from native and non-native nest predators. We did not observe significant impacts of precipitation or nest initiation date on nest survival. Nests in California boxthorn ( Lycium californicum ) had significantly lower survival rates than nests in other substrates. The native San Clemente Island fox ( Urocyon littoralis clementae ) was the most common nest predator, followed by non-native black rats ( Rattus rattus ). Overall, nests were much more likely to be predated by native than non-native predators. This suggests that San Clemente Bell’s Sparrows could achieve recovery despite the presence of non-native predators. Our findings help describe and quantify the breeding ecology of San Clemente Bell’s Sparrows, providing necessary information for data-driven management and recovery efforts. manejo y recuperación basados en los datos.","PeriodicalId":15785,"journal":{"name":"Journal of Field Ornithology","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71042037","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":"A comparison of the breeding biology of the Bornean Whistling-Thrush (Myophonus borneensis) and White-crowned Forktail (Enicurus leschenaulti borneensis)","authors":"Elise Zarri, T. E. Martin","doi":"10.5751/jfo-00133-930303","DOIUrl":"https://doi.org/10.5751/jfo-00133-930303","url":null,"abstract":". Advances in understanding geographic patterns of life history variation depend on documentation of life history traits for species in poorly studied regions. In the tropics, most species have not had their life history traits described. We compared the reproductive biology of two closely related Muscicapids, the Bornean Whistling-Thrush ( Myophonus borneensis ) and the Bornean subspecies of the White-crowned Forktail ( Enicurus leschenaulti borneensis ), coexisting in Mount Kinabalu Park in Sabah, Malaysia. Both species specialize in riparian habitats, but whistling-thrushes are more adaptable to human presence and can be found nesting on and foraging around buildings, whereas forktails are more wary of humans. We located and monitored 77 forktail nests and 130 whistling-thrush nests from 2009 to 2020. Mean clutch size was 2.00 ± 0.04 for forktails and 1.89 ± 0.04 for whistling-thrushes. Mean egg mass at lay was 4.07 ± 0.04 g for forktails and 11.65 ± 0.12 g for whistling-thrushes. Forktail incubation period (17.0 ± 0.42 d) was slightly shorter than for whistling-thrush (18.6 ± 0.19 d), but both species had similar rates of incubation attentiveness","PeriodicalId":15785,"journal":{"name":"Journal of Field Ornithology","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71042334","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":"Sexing Eurasian Eagle Owls by external body and skeletal measurements","authors":"M. Analla, Pilar Fernández-Rodríguez, Noelia Martínez-Medina, C. Azorit","doi":"10.5751/jfo-00175-930401","DOIUrl":"https://doi.org/10.5751/jfo-00175-930401","url":null,"abstract":"","PeriodicalId":15785,"journal":{"name":"Journal of Field Ornithology","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71042406","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":"Female song is structurally different from male song in Orchard Orioles, a temperate-breeding songbird with delayed plumage maturation","authors":"M. Moyer, Evangeline M. Rose, D'Juan A. Moreland, Aiman Raza, Sean M. Brown, Alexis L. Scarselletta, B. Lohr, Karan J. Odom, K. E. Omland","doi":"10.5751/jfo-00073-930103","DOIUrl":"https://doi.org/10.5751/jfo-00073-930103","url":null,"abstract":". Female birds in many temperate species are thought to sing reduced or quieter songs and appear to sing less often than their male counterparts. Therefore, female song may be easily overlooked. Increasingly, researchers are recording female song in well-studied species previously assumed to have little or no female song. In this study, we document the extensive use of female song in Orchard Orioles ( Icterus spurius ), a species with delayed plumage maturation where female song had not been well-documented. Based on observations of females singing in the early breeding season, we hypothesized that female song may function for mate attraction. To formally investigate whether females sing specifically early in the season, we assessed singing rates of each sex throughout the breeding season. We also performed detailed acoustic analyses comparing male and female song structure. Females sang significantly less often than males, and female and male songs were statistically different for five of eight variables investigated, indicating that the two en cinco de las ocho variables investigadas, indicando que los dos sexos cantan cantos acústicamente diferentes. Sin embargo, las hembras también cantaron más frecuentemente que lo asumido inicialmente, sugiriendo que los investigadores pueden estar pasando por alto el canto de las hembras de otras especies si no lo están buscando directamente, en particular en especies en donde los machos de primer año y las hembras tienen coloraciones similares. Por lo tanto, este estudio resaltamos la necesidad de re-explorar sistemas bien estudiados. Se requiere más investigación para determinar si el canto de las hembras tiene una función y como es esta función.","PeriodicalId":15785,"journal":{"name":"Journal of Field Ornithology","volume":"161 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71041890","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":"Interannual colony exchange among breeding Eastern Brown Pelicans","authors":"Bradley P. Wilkinson, P. Jodice","doi":"10.5751/jfo-00074-930105","DOIUrl":"https://doi.org/10.5751/jfo-00074-930105","url":null,"abstract":"Colonial seabirds often display high rates of interannual site fidelity to breeding locations, especially as adults. Species using more nearshore or coastal systems, however, may display comparatively less fidelity than highly pelagic species. We used longterm GPS tracking data to assess the frequency of interannual colony switching in Eastern Brown Pelicans (Pelecanus occidentalis carolinensis) in the South Atlantic Bight, a species about which adult site fidelity is poorly understood. By using recursive behavioral patterns to identify nest locations, we report 36% of reproductive attempts occurred at colonies that were different from the colony used in a prior year. Colony switching was especially prevalent in female pelicans, and distances between switched colonies ranged from 56 to 592 km. We suggest that long-term telemetry may be a reliable tool for assessing interannual breeding site fidelity, especially when compared to more traditional band resighting efforts. RESUMEN. Las aves marinas coloniales con frecuencia muestra una alta fidelidad interanual en la ubicación de la reproducción, especialmente como adultos. Las especies que usan sistemas cerca de la costa o costales, sin embargo, pueden mostrar comparativamente menor fidelidad que las especies pelágicas. Utilizamos datos de largo plazo de rastreadores GPS para determinar la frecuencia de cambio interanual de colonias por Pelecanus occidentalis carolinensis en la bahía del sur del atlántico, una especie sobre la cual la fidelidad de los adultos es poco entendida. Por medio del uso de patrones comportamentales recursivos, para identificar la ubicación de los nidos, reportamos que el 36% de los intentos de reproducción ocurrieron en colonias diferentes a las colonias utilizadas el año anterior. El intercambio de colonias fue especialmente prevalente en pelicanos hembra y las distancias entre las colonias tuvieron un rango entre 56 y 592 km. Sugerimos que la telemetría a largo plazo puede ser una herramienta confiable para determinar la fidelidad de sitios de reproducción interanual, especialmente cuando es comparada con métodos más tradicionales de anillamiento y reavistamiento.","PeriodicalId":15785,"journal":{"name":"Journal of Field Ornithology","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71041534","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":"A pattern and procedure for sewing bird bags for bird banders and ringers","authors":"J. Strassmann, Bruna Mayer de Souza, Alice Van Zoeren, W. Scharf","doi":"10.5751/jfo-00143-930302","DOIUrl":"https://doi.org/10.5751/jfo-00143-930302","url":null,"abstract":"","PeriodicalId":15785,"journal":{"name":"Journal of Field Ornithology","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71042146","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}