Journal of Field Ornithology最新文献

{"title":"Snake predators of bird eggs: a review and bibliography","authors":"J. Barends, B. Maritz","doi":"10.5751/jfo-00088-930201","DOIUrl":"https://doi.org/10.5751/jfo-00088-930201","url":null,"abstract":". Snakes are frequent predators of bird nests and therefore potentially have an important impact on bird population dynamics. However, while many species are known to consume nestlings and chicks, few species have been recorded consuming bird eggs. To effectively quantify the effects of bird egg predation by snakes on bird demographics, a key first step is to identify which snake species consume bird eggs. Unfortunately, detailed information on the dietary habits of most snakes is scarce and feeding records are poorly cataloged, making it difficult to ascertain which species do and do not eat bird eggs. We reviewed the literature and online community science reports to compile a global list of confirmed snake predators of bird eggs. In total, we gathered 471 feeding records of 123 snake taxa consuming the eggs of at least 210 bird species from 238 individual data sources. Geographical locations of records disproportionately represented well-sampled regions, and we infer that many snake species not included on our list also consume bird eggs. However, we found that oophagous snakes tend to be long (mean maximum length = 2057 mm) and mostly eat eggs that are small in diameter (mean egg diameter = 24 mm), suggesting that relative prey bulk is an important constraint of these interactions. Therefore, we expect that other snakes that eat birds are likely to mostly include congeneric and ecologically similar species to those reflected in our review. By knowing which snakes consume bird eggs, future research can consider species- and site-specific hypotheses when investigating the ecological effects of bird egg predation by snakes. Those results can also inform conservation practitioners on the causes and consequences of variation in nest success that may aid in decision-making when designing conservation management plans. de la presa es una restricción importante de estas interacciones. Por lo tanto, esperamos que otras especies que comen aves, muy probablemente incluyen especies congenéres o ecológicamente similares a las incluidas en nuestra revisión. Conociendo cuales especies consumen huevos de aves, las estudios futuros pueden considerar hipótesis especificas al sitio y a la especie al investigar los efectos ecológicos de la depredación de huevos de aves por serpientes. Esos resultados pueden también informar a conservacionistas sobre las causas y consecuencias de la variación en el éxito de los nidos, lo cual puede ayudar en la toma de decisiones durante el diseño de planes de manejo para conservación.","PeriodicalId":15785,"journal":{"name":"Journal of Field Ornithology","volume":"157 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71041601","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":"Cormorant abundance, diet, and foraging habits in Arizona","authors":"Larisa E. Harding, Jacob I. Mesler","doi":"10.5751/jfo-00141-930306","DOIUrl":"https://doi.org/10.5751/jfo-00141-930306","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":"71042077","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":"Quantification of physiological aging criteria utilizing window strike data","authors":"E. Rhodes, Joel A. Borden, John McCreadie","doi":"10.5751/jfo-00220-930412","DOIUrl":"https://doi.org/10.5751/jfo-00220-930412","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":"71042575","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 predation risk influences the Varied Tit’s life history strategy in response to temperature and precipitation","authors":"Yiting Jiang, Fanmei Shang, Xiaocui Ma, Dongmei Wan","doi":"10.5751/jfo-00186-930407","DOIUrl":"https://doi.org/10.5751/jfo-00186-930407","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":"71042627","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 surveillance camera reveals season-long nesting activities and behaviors at a nest of the Northern Black Swift (Cypseloides niger borealis)","authors":"C. Gunn","doi":"10.5751/jfo-00187-930410","DOIUrl":"https://doi.org/10.5751/jfo-00187-930410","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":"71042698","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":"Diurnal and nocturnal movements of Kori Bustards in the Serengeti ecosystem","authors":"E. C. Mmassy, P. Ranke, Nicephor Lesio, C. Jackson, R. May, E. Røskaft","doi":"10.5751/jfo-00188-930409","DOIUrl":"https://doi.org/10.5751/jfo-00188-930409","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":"71042759","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":"Capture height biases for birds in mist-nets vary by taxon, season, and foraging guild in northern California","authors":"D. J. Tattoni, Katie LaBarbera","doi":"10.5751/jfo-00021-930101","DOIUrl":"https://doi.org/10.5751/jfo-00021-930101","url":null,"abstract":"Mist-netting is a widely used technique for capturing birds to estimate abundance, demography, and population trends. Investigators in most studies use primarily or only ground-level mist-nets that extend < 3 m vertically. Therefore, data analyses require assumptions that the degree to which birds of interest occupy unsampled vertical space is unrelated to variables of interest, e.g., age structure, sex ratio, arrival and departure dates, and probability of recapture. Despite the widespread use of analyses based on these assumptions, they have rarely been tested. We analyzed capture data from paired ground-level and elevated (~3–5 m above the ground) mist-nets from 1993 to 2020 at Coyote Creek Field Station in Milpitas, CA, USA. Because capture height biases are driven by behavior, we expected that they may vary by net location, foraging guild, capture history, age, sex, and season. We built binomial models in a Bayesian framework to analyze the effects of these variables. Of 43 taxa, 13 were biased toward capture in elevated nets and seven toward capture in ground-level nets. These biases showed little variation among three net locations. Capture height biases were largely consistent with the documented heights of different foraging guilds. In one taxon, recaptured birds were more likely to be captured in elevated nets, possibly because of net avoidance or differences between overwintering and transient individuals. Only one taxon each exhibited either a sex or age effect on capture height. We found seasonal patterns in capture height for five taxa including residents and shortand long-distance migrants. Our results demonstrate that capture height biases were present at our research site and that the standard practice of deploying only ground-level nets may bias data in ways not generally recognized. Further study of these biases could improve mist-netting methods and increase the value of bird banding data. RESUMEN. La captura de aves con redes de niebla es una técnica ampliamente utilizada para estimar la abundancia demografía y tendencias poblacionales. En la mayoría de los estudios, los investigadores utilizan redes de niebla al nivel del suelo que se extienden < 3 m verticalmente. Por lo tanto, el análisis de datos requiere de supuestos como que el grado en el cual las aves de interés ocupan el espacio vertical no muestreado no se encuentra relacionado con las variables de interés, e.g., estructura de edad, la proporción de sexos, fechas de llegada y de partida y probabilidad de recaptura. A pesar del uso común de los análisis que se basan en dichos supuestos, estos raramente han sido puestos a prueba. Analizamos datos de captura con redes de niebla pareadas a nivel del suelo y elevadas (~3– 5 m por encima del suelo) entre 1993 y 2020 en la estación de campo de Coyote Creek en Milpitas, CA, EEUU. Debido a que los sesgos en la altura de la captura están determinados por el comportamiento, esperamos que estos pueden variar por la ubicación de","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":"71041102","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":"Foraging and roosting habitat of Eastern Whip-poor-wills in the northeastern United States","authors":"K. J. Spiller, David I. King, Jeffrey S. Bolsinger","doi":"10.5751/jfo-00057-930106","DOIUrl":"https://doi.org/10.5751/jfo-00057-930106","url":null,"abstract":"The Eastern Whip-poor-will (Antrostomus vociferus: hereafter whip-poor-will) has been declining from historical population levels throughout its range in the northeast. Although whip-poor-wills have been reported to use a variety of habitats, most recent studies have associated whip-poor-wills with open canopy habitats, such as early-successional habitats or forest edges. However, there remain substantial gaps in our understanding of whip-poor-wills’ habitat associations. For example, historical accounts state that whip-poor-wills roost and nest in forest and forage in openings, and thus, managers advocate the juxtaposition of habitats based on this supposition. Nevertheless, a quantitative evaluation of the habitat used for these activities is lacking. For this reason, we radiotracked 10 adult whip-poor-wills using radio telemetry in upstate New York and collected vegetation measurements at a subset at these points where the birds were either foraging at night or roosting during the day, as well as at any identified nest sites. Comparisons of the vegetation measurements revealed that foraging habitat was significantly more open than roosting habitat, as foraging habitat had lower tree density, basal area, and understory height. Contrary to historical accounts, the few nest sites found in this study were located in areas that had low basal area, similar to the habitat at foraging locations. These results suggest that although creating more opencanopy habitat may benefit whip-poor-wills by providing suitable foraging habitat, and potentially nesting habitat, maintaining denser forest within proximity to these open areas may also provide valuable cover for roosting whip-poor-wills. RESUMEN. El pato silbador oriental (Antrostomus vociferus) ha disminuido su población comparada con niveles históricos en toda su área de distribución en el noreste. Aunque se ha informado que A. vociferus utilizan diversos hábitats, la mayoría de los estudios recientes han asociado a A. vociferus con hábitats de dosel abierto, como los hábitats de transición temprana o los bordes de los bosques. Sin embargo, siguen existiendo importantes vacíos en nuestro conocimiento de las asociaciones de hábitat por parte de especies de este género. Por ejemplo, los relatos históricos afirman que A. vociferus se perchaba y anidaba en el bosque y se alimentaba en los claros, por lo que los gestores abogan por la yuxtaposición de hábitats basándose en esta suposición. Sin embargo, se carece de una evaluación cuantitativa del uso hábitat para estas actividades. Por este motivo, hemos puesto radios en 10 adultos de A. vociferus para utilizar radiotelemetría en el norte del estado de Nueva York y hemos colectado mediciones de la vegetación en un subconjunto de estos puntos en los que los pájaros buscaban comida por la noche o se perchaban durante el día, así como en los lugares de nidificación identificados. Las comparaciones de las mediciones de la vegetación revelaron que el hábitat de ","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":"71041452","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":"Regional song dialects of the Ruby-crowned Kinglet","authors":"E. Pandolfino, L. Douglas","doi":"10.5751/jfo-00120-930206","DOIUrl":"https://doi.org/10.5751/jfo-00120-930206","url":null,"abstract":". We used archived recordings of Ruby-crowned Kinglet ( Corthylio calendula ) songs to examine characteristics of the song, repertoire size, and regional dialects across the species’ breeding range and to assess possible cultural evolution in dialects. Using recordings of 313 individuals, we confirmed that individuals have a single song type and that there are distinct regional song dialects. Our examination of phrases that form the last of this species’ 3-part song revealed 43 different phrase types. We defined seven regions based on geographic features, ecoregions, and obvious clustering of particular phrase types. An eighth region corresponded to the published range of the subspecies C. c. grinnellii , coastal southern Alaska and the British Columbia coast. In each of those regions, two to three phrase types dominated and were found exclusively or primarily within a single region. Our finding of regional dialects confirms that the song of the Ruby-crowned Kinglet is, at least with respect to this phrase, learned rather than innate. In species, such as this kinglet that sing during migration or in their non-breeding range, mapped dialects can help reveal migration strategy and migratory connectivity. Monitoring changes in dialects over time can confirm cultural evolution and shed light on both the timing and location of song learning. RESUMEN","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":"71041580","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":"Parental care in a sexually monomorphic Picid, the Red-headed Woodpecker","authors":"L. Walter, C. Viverette, L. Bulluck","doi":"10.5751/jfo-00089-930203","DOIUrl":"https://doi.org/10.5751/jfo-00089-930203","url":null,"abstract":". Parental care is energetically costly and is thus shared by parents in many bird species. Little is known about how parental care is shared in pairs of sexually monomorphic species. Red-headed Woodpeckers ( Melanerpes erythrocephalus ) are a sexually monomorphic and socially monogamous species in an almost exclusively dimorphic family (> 99% of species; Picidae). We assessed duration of diurnal incubation and brooding and frequency of nestling provisioning and nest cleaning for individually marked breeding Red-headed Woodpeckers at Fort A.P. Hill, Virginia, USA. Individuals were genetically sexed using DNA from feather samples. In addition to parent sex, we evaluated the influence of nestling characteristics (brood size and nestling age) and exogenous factors (habitat type, date, and maximum daily temperature) on parental care behaviors. We recorded and analyzed video at nests during the incubation and nestling stages. We found that females diurnally incubate more than males and males almost exclusively remove fecal sacs from nests. Using generalized linear mixed models, we found females brood young nestlings more than males, but males are the only parent to enter the cavity when chicks are > 10 days old. We found provisioning peaked during the middle of the nestling period, and provisioning frequency was higher in early summer (before 7 July) compared to late summer. The seasonal reduction in provisioning could be related to resource availability but warrants further study. This division of reproductive roles is common in dimorphic","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":"71041649","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}