Journal of Field Ornithology最新文献

{"title":"Tritrophic interactions with avian predators: the effect of host plant species and herbivore-induced plant volatiles on recruiting avian predators","authors":"Mercille Nguyen, Catherine McGrath, Caitlin R. McNamara, Alex Van Huynh","doi":"10.5751/jfo-00050-930104","DOIUrl":"https://doi.org/10.5751/jfo-00050-930104","url":null,"abstract":". Herbivore-induced plant volatiles (HIPVs) are important signaling compounds released by plants upon wounding. These compounds have been shown to mediate tritrophic interactions in recruiting insect predators and parasitoids. Recent work has begun to show that avian species, which were once thought to have a very limited sense of smell, can cue in on these HIPVs to find insect prey. Here, we test the ability for two general HIPVs, methyl jasmonate and methyl salicylate, to recruit avian predators. We test the recruitment efficacies of these HIPVs across four different host plant species, black walnut ( Juglans nigra ), red maple ( Acer rubum ), cattail ( Typha latifolia ), and wheat ( Triticum aestivum ), and use clay caterpillars to quantify predation by insectivorous birds. We found no significant differences in predation between treatment groups across any of our host plants. However, there was a nearly significant effect of methyl salicylate in black-walnut trees. Interestingly, our results did show a significant effect of host plant species on predation levels. The two tree species, particularly black walnut, had higher levels of predation than the herbaceous species. We discuss the implications of these results and suggest a number of ideas and suggestions for future studies investigating the role of HIPVs in attracting insectivorous birds. particularmente el nogal negro, tuvieron niveles más altos de depredación que las especies herbáceas. Discutimos las implicaciones de estos resultados y sugerimos una serie de ideas y sugerencias para futuros estudios que investiguen el papel de los HIPV en la atracción de aves insectívoras.","PeriodicalId":15785,"journal":{"name":"Journal of Field Ornithology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71041252","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":"Demography and site fidelity of a grassland bird, the Henslow's Sparrow, in powerline right-of-way habitat","authors":"E. A. Hunter, Abigail W. Dwire, T. Schneider","doi":"10.5751/jfo-00077-930109","DOIUrl":"https://doi.org/10.5751/jfo-00077-930109","url":null,"abstract":"Grassland birds are among the fastest declining avian species in North America, primarily due to habitat loss. In the southeastern United States, much grassland and open savanna habitat has been converted to timber production or agriculture, neither of which typically provides habitat for breeding or wintering grassland birds. Powerline right-of-ways could provide suitable habitat for many grassland species because these areas are maintained to be treeless. We studied the population dynamics of Henslow's Sparrows (Centronyx henslowii) wintering in powerline right-of-ways in southeastern Georgia through an 11-year mark-recapture study. We used a robust design Cormack-Jolly-Seber model to estimate probability of detection and apparent survival. Abundance varied substantially among years at each site, with density varying from 1.7 to 8.5 birds/ha. Within-year detection probability was moderately high at 28% (24-33%, 95% credible interval [CI]), but apparent survival was very low at 13% (9-17%, 95% CI). This low apparent survival was likely due to low return rates (and not necessarily low survival). However, birds that did return to the study sites had extremely high site fidelity, with 82% of across-year recaptures < 200 m apart. This apparent incongruity between low apparent survival rates (likely due to emigration from the study sites) and high site fidelity for returning individuals could be explained by the dependability of the rightof-way habitat, which differs from typically patchy and temporally variable grassland and savanna wintering habitats. Dependable habitat may allow for higher site fidelity than this species would otherwise have, potentially resulting in the high densities we observed. Thousands of miles of right-of-ways in Georgia, and other southeastern states, could be managed to maximize potential habitat for declining grassland bird species. RESUMEN. Las aves de pastizal se encuentran entre las especies de aves que más rápidamente están disminuyendo en Norteamérica, debido principalmente a la pérdida de hábitat. En el sureste de Estados Unidos, una gran parte del hábitat de pastizal y de sabana abierta se ha convertido a la producción maderera o a la agricultura, que en ningún caso proporcionan hábitat apropiado para las aves de pastizal en época reproductiva o de invernada. Los derechos de paso de las líneas eléctricas podrían proporcionar un hábitat adecuado para muchas especies de pastizales, ya que estas zonas se mantienen sin árboles. Estudiamos la dinámica poblacional del gorrión de Henslow (Centronyx henslowii) en los derechos de paso de las líneas eléctricas en el sureste de Georgia durante la invernada, mediante un estudio de marcado y recaptura de 11 años. Se utilizó un modelo de diseño robusto Cormack-Jolly-Seber para estimar la probabilidad de detección y la supervivencia aparente. La abundancia varió sustancialmente entre años para cada sitio, con una densidad que osciló entre 1,7 y 8,5 aves/ha. La probabilidad de de","PeriodicalId":15785,"journal":{"name":"Journal of Field Ornithology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71041555","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":"Migratory behavior and connectivity revealed in a secretive Neotropical migratory songbird, the Swainson’s Warbler","authors":"A. Brunner, Bryant C. Dossman, V. Jirinec, Katie L. Percy, C. Tonra, Erik I. Johnson, P. Marra","doi":"10.5751/jfo-00134-930305","DOIUrl":"https://doi.org/10.5751/jfo-00134-930305","url":null,"abstract":"","PeriodicalId":15785,"journal":{"name":"Journal of Field Ornithology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71041974","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":"Risky foraging by Ring-billed Gulls (Larus delawarensis)","authors":"Ryan S. Call, D. Shutler","doi":"10.5751/jfo-00172-930304","DOIUrl":"https://doi.org/10.5751/jfo-00172-930304","url":null,"abstract":"","PeriodicalId":15785,"journal":{"name":"Journal of Field Ornithology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71042302","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 ringing data to inform geolocator deployment: a case study of the Red-capped Robin-chat Cossypha natalensis in East Africa","authors":"Raphäel Nussbaumer, Lennox Kirao, F. Liechti, C. Jackson","doi":"10.5751/jfo-00113-930208","DOIUrl":"https://doi.org/10.5751/jfo-00113-930208","url":null,"abstract":"","PeriodicalId":15785,"journal":{"name":"Journal of Field Ornithology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71041843","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":"Body condition and molt chronology of waterfowl in east central Texas","authors":"Rachel A. Vanausdall, D. Collins, W. Conway, Kevin J. Kraai, C. Mason, Jeffrey W. Gunnels","doi":"10.5751/jfo-00178-930405","DOIUrl":"https://doi.org/10.5751/jfo-00178-930405","url":null,"abstract":"","PeriodicalId":15785,"journal":{"name":"Journal of Field Ornithology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71042116","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":"Twenty-two years of brood parasitism data do not support the mafia hypothesis in an accepter host of the Brown-headed Cowbird (Molothrus ater)","authors":"Abbigail M. Turner, Mark E. Hauber, D. Reichard","doi":"10.5751/jfo-00180-930404","DOIUrl":"https://doi.org/10.5751/jfo-00180-930404","url":null,"abstract":"","PeriodicalId":15785,"journal":{"name":"Journal of Field Ornithology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71042538","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":"Long-distance dispersal in a recovering endangered shorebird population facilitates recolonization of historical nesting sites following decades of extirpation","authors":"Andrew David Brown, F. Cuthbert, Alice Van Zoeren, Stephanie C. Schubel, E. Nol","doi":"10.5751/jfo-00122-930207","DOIUrl":"https://doi.org/10.5751/jfo-00122-930207","url":null,"abstract":"","PeriodicalId":15785,"journal":{"name":"Journal of Field Ornithology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71041633","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":"Minimum capture-recapture rates and years of banding station operations to obtain reliable adult annual survival estimates","authors":"Danielle R. Kaschube, J. Saracco, C. Ray, Christine M. Godwin, K. Foster, P. Pyle","doi":"10.5751/jfo-00071-930107","DOIUrl":"https://doi.org/10.5751/jfo-00071-930107","url":null,"abstract":". We examined variability in adult annual survival rate estimates for 33 breeding bird species, using 2011–2019 data from a 38-station Monitoring Avian Productivity and Survivorship (MAPS) program in Alberta, Canada. Using coefficient of variation (CV) as a metric, we provide recommendations for number of years a station should be operated and numbers of captures and between-year recaptures required to achieve acceptable levels of precision for adult survival estimation. Our primary aim was to provide minimum sample-size guidelines for MAPS banding station operators. The proportion of individual species × spatial scale scenarios for which we could obtain adult survival estimates, as well as the precision of those estimates, increased substantially once six years of data were collected, and we recommend six years as a target minimum level of continuity for banding station operation. Across 33 species analyzed, averages of 23.4 captures (3.9/yr) and 2.1 recaptures (0.4/yr) were needed to yield marginally precise survival estimates (CV of 20% to 30%, inclusive), while averages of 89.2 captures (14.9/yr) and 6.3 recaptures (1.1/yr) were needed to achieve more precise estimates (CV Para las 33 especies analizadas, se necesitaron en promedio 23,4 capturas (3,9/año) y 2,1 recapturas (0,4/año) para obtener estimaciones de supervivencia marginalmente precisas (CV del 20% al 30%, inclusivos), mientras que se necesitaron en promedio 89,2 capturas (14,9/año) y 6,3 recapturas (1,1/año) para lograr estimaciones más precisas (CV < 20%). Sugerimos estos datos como directrices para las tasas mínimas de captura y recaptura a escala de estaciones de anillamiento individuales y para grupos de estaciones, por ejemplo, múltiples estaciones operadas en un tipo de hábitat seleccionado o región de muestreo, respectivamente. Sin embargo, hay que tener en cuenta que el tamaño de muestra variará notablemente entre las especies. Por ejemplo, las estimaciones confiables de la supervivencia de especies con baja fidelidad interanual, e.g., Leiothlypis peregrina , no podrán obtenerse con ningún tamaño de muestra; mientras que las especies con alta fidelidad interanual y probabilidad de recaptura, por ejemplo, algunos atrapamoscas, mirlas, gorriones y reinitas, requerirán tamaños de muestra más pequeños que los propuestos aquí como directrices.","PeriodicalId":15785,"journal":{"name":"Journal of Field Ornithology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71041071","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":"Plunge diving by Brown Pelicans resembles a Split-S Turn","authors":"W. Shoop, E. Tilson","doi":"10.5751/jfo-00064-930102","DOIUrl":"https://doi.org/10.5751/jfo-00064-930102","url":null,"abstract":"In addition to feeding on fish at the water surface, the Brown Pelican (Pelecanus occidentalis) exhibits a range of diving attacks that include a unique form of high plunge diving. The high plunge dive begins with normal, upright flight and with prey detection the Brown Pelican will shift into a dive and often complete an aerial 180 degree counterclockwise rotation of the body prior to water entry. After inverted water entry, the bird follows a simple but shallow 180 degree half-loop underwater and returns to the surface upright near where it entered, but in a direction opposite that of the original flight path. This curious plunge diving behavior has hitherto remained inexplicable but has similarities to the Split-S air combat maneuver in human aviation. The Split-S also begins with normal, upright flight that enters a 180 degree inverted dive and ends with a 180 degree half-loop. When used offensively in air combat the Split-S is a hunting tactic wherein a pilot identifies a target directly below and rolls 180 degrees to an inverted attitude. Inverted diving is one of the quickest ways to stop forward air speed and convert it to a downward direction. It also allows visual contact with a moving target throughout the dive. A 180 degree half-loop at the end naturally restores the 180 degree inversion to an upright attitude, albeit opposite to the original flight path. RESUMEN. Adicionalmente a alimentarse de peces en la superficie del agua, Pelecanus occidentalis, muestra una variedad de ataques, entre los cuales incluye una forma única de zambullirse desde la altura. La zambullida se inicia con un vuelo vertical normal y con la detección de la presa el pelícano se mueve hacia la posición de ataque y con frecuencia completa una rotación aérea del cuerpo de 180 grados en contra de las manecillas del reloj antes de entrar al agua. Luego de entrar al agua en posición invertida, el ave realiza media vuelta sumergida simple pero superficial de 180 grados y retorna a la superficie en posición vertical cerca del sitio de entrada, pero en dirección opuesta a la ruta de vuelo original. Este curioso comportamiento de la zambullida ha sido hasta el momento inexplicable pero tiene similitudes con la maniobra de combate de S dividida en aviación humana. La maniobra de la S dividida también comienza con el vuelo en posición vertical y entra en una zambullida en posición invertida de 180 grados que termina con media vuelta de 180 grados. Cuando es usada ofensivamente, la maniobra de combate de S dividida, es una táctica de cacería donde el piloto identifica el blanco directamente debajo y rueda 180 grados hacia una posición invertida. La zambullida invertida es una de las formas más rápidas de parar la velocidad del viento hacia adelante para convertirla en la dirección hacia abajo. También permite contacto visual con un blanco en movimiento a lo largo de la zambullida. La media vuelta de 180 grados al final, naturalmente recupera la inversión de 180 grados haci","PeriodicalId":15785,"journal":{"name":"Journal of Field Ornithology","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71041403","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}