Wilson Journal Of Ornithology最新文献

{"title":"Ornithological Literature","authors":"B. Beehler","doi":"10.1676/22-00035","DOIUrl":"https://doi.org/10.1676/22-00035","url":null,"abstract":"HOW BIRDS EVOLVE: WHAT SCIENCE REVEALS ABOUT THEIR ORIGIN, LIVES & DIVERSITY. Douglas J. Futuyma. Princeton University Press, Princeton, NJ. 2021: ix þ 269 pages, 24 color plates in one color signature, 57 figures, 3 tables. ISBN 978-0-6911-8262-9 (hardback).—Douglas J. Futuyma is a distinguished evolutionary biologist based at Stony Brook University, New York. A member of the National Academy of Sciences and recipient of numerous honors, he is perhaps most known for his widely used college level text Evolution as well as for other books dealing with evolutionary biology. He is not an ornithologist but most certainly qualifies as an avid birder who has traveled widely in the world specifically to enjoy birds, a point he makes throughout this book. How Birds Evolve is a concise but nonetheless sweeping review of much of what is presently known about avian evolution as it relates to almost all facets of avian natural history. The book breaks no new ground nor is it meant to as it is written for a general audience. What Futuyma accomplishes is a succinct but masterful account that fully engages the reader. Futuyma presents numerous questions that routinely occur to students of ornithology as well as astute birders when observing and thinking about why birds are what they are and do what they do. Examples used are well known to those of us who study and teach ornithology and Futuyma adeptly explains each of them. His choice of examples is admirable. Many examples include molecular and cladistic studies, all written with a clarity that should keep even the most ‘‘molecularly challenged’’ reader engaged. I admired how Futuyma explains complex topics such as the various models for sexual selection, life cycle evolution, what adaptation is, and how it is studied and measured. Each of the 12 chapters explains a particular facet of avian evolution: the avian tree of life, emergence of birds from dinosaurs, how bird populations change and adapt, variation within species, evolution of adaptations, life cycle evolution, sexual selection, avian social life, speciation, global avian diversity, and extinction possibilities in light of climate change and habitat alteration. Each chapter has numbered citations listed in chapter end notes and there is a thorough bibliography and index. The chapter titles are meant to engage the reader; ‘‘The Ruff and the Cuckoo’’ (chapter 5), ‘‘Hoatzin and Hummingbirds’’ (chapter 6), ‘‘Owls and Albatrosses’’ (chapter 7), but the chapter titles are a bit misleading as the named birds form only a part of each chapter with many more examples included. The chapter subtitles offer more clarity. For example, the Ruff and the cuckoo are discussed as examples of ‘‘Variation within Species,’’ along with other examples such as crossbills, Gouldian Finch, White-throated Sparrow, and buteo hawks. Chapter 9, ‘‘Anis, Swallows, and Bee-eaters,’’ is focused on ‘‘The Social Life of Birds.’’ Futuyma writes with a light touch and frequently inserts r","PeriodicalId":54404,"journal":{"name":"Wilson Journal Of Ornithology","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2022-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43299049","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":"Intrabrood variation in nestling mass among three sagebrush-associated songbirds","authors":"Ashleigh M. Rhea, J. Carlisle, A. Chalfoun","doi":"10.1676/21-00047","DOIUrl":"https://doi.org/10.1676/21-00047","url":null,"abstract":"ABSTRACT The young of some altricial bird species hatch asynchronously, which can lead to considerable size differences among siblings. Nestling traits such as body mass, moreover, can carry over and influence post-fledging survival. Despite the potential importance of nestling mass for reproductive outcomes, however, variation in nestling mass and relationships with brood size has been described and quantified rarely. We weighed 453 nestlings from 148 nests of 3 sympatric, sagebrush-associated songbird species in Wyoming, USA, to describe the range of intrabrood mass differences. Intrabrood differences in nestling mass were greatest for the largest species, the Sage Thrasher (Oreoscoptes montanus), for which the smallest nestling in a brood was on average 26.2% smaller than the largest. The smaller Vesper Sparrow (Pooecetes gramineus) and Brewer's Sparrow (Spizella breweri) exhibited similar intrabrood mass ratios, with the smallest nestling being 17.4% and 18.4% smaller on average than the largest for the 2 species, respectively. For each additional nestling within a brood, the smallest nestling was an additional 6.6–13.6% smaller than the largest nestling, depending on species. Understanding the extent of intrabrood variation in nestling traits has important implications for the productivity of species facing unpredictable environments. RESUMEN (Spanish) Los polluelos de algunas especies de aves altriciales eclosionan asincrónicamente, lo que puede tener como consecuencia diferencias considerables en el tamaño de los polluelos de una misma nidada. Las características de los polluelos, como la masa corporal, pueden además influenciar la sobrevivencia posemancipatoria. Pese a la importancia potencial de la masa de los polluelos en el resultado reproductivo, la variación en la masa de los polluelos y su relación con el tamaño de la nidada han sido raramente cuantificadas. Pesamos 453 polluelos de 148 nidos de 3 especies simpátricas de pájaros asociados al matorral de artemisa en Wyoming, EUA, para describir el rango de diferencias de masa al interior de cada nidada. Las diferencias al interior de cada nidada fueron más grandes para las especies más grandes. En el cuitlacoche Oreoscoptes montanus el polluelo más pequeño fue en promedio 26.2% menor que el más grande. El ligeramente más pequeño gorrión Pooecetes gramineus y el gorrión Spizella breweri mostraron proporciones de masa intranidada similares, con el polluelo más pequeño siendo 17.4% y 18.4% menor que el más grande para las 2 especies, respectivamente. Para cada polluelo adicional al interior de una nidada, el polluelo más pequeño fue 6.6–13.6% más pequeño que el polluelo más grande, dependiendo de la especie. Entender la cantidad de variación intranidada en las características de los polluelos tiene implicaciones importantes para la productividad de las especies en ambientes impredecibles. Palabras clave: aves canoras, masa, masa intranidada, matorral de aremisa, polluelo.","PeriodicalId":54404,"journal":{"name":"Wilson Journal Of Ornithology","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2022-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49021991","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 reproductive success of Rock Wrens (Salpinctes obsoletus) in northern Colorado","authors":"Steph Pitt, Lauryn Benedict","doi":"10.1676/21-00077","DOIUrl":"https://doi.org/10.1676/21-00077","url":null,"abstract":"ABSTRACT Breeding ecology plays a crucial role in avian fitness and evolution, yet basic life history is understudied for many species. Species with large distributions over a breadth of latitudes may have different strategies regarding reproduction in the northern or southern extents of their range, but those differences could be overlooked due to a sparsity of published information. Rock Wrens (Salpinctes obsoletus) are migratory in the northern part of their range, territorial, and monogamous songbirds with populations thought to be in decline. We collected natural history information on 21 mated pairs from a migratory population in northern Colorado to describe nesting ecology and reproductive success. We evaluated nesting life-history traits and parental care throughout the breeding season at 12 monitored nests. Results indicated that 42.9% of nests fledged at least 1 chick, with means (±SD) of 5.63 ± 1 eggs per clutch, 3.44 ± 0.53 hatchlings per nest, and 2.67 ± 0.5 fledglings per nest. Mean duration of egg incubation was 15.10 ± 0.32 d with 29.11 ± 1.27 total days of eggs and chicks in the nest. Camera trapping revealed male Rock Wrens did the majority of prey delivery to chicks in the first 5 d post-hatching and fed chicks a range of prey species. The population reproductive success was mostly affected by nest predation, where predators included bullsnakes (Pituophis catenifer) and prairie rattlesnakes (Crotalus viridis). Outcomes provide the first estimates of sex-specific parental feeding behavior for this species, and document new nest predation threats. Breeding biology metrics of the studied migratory population were similar to those of sedentary populations, suggesting that knowledge gained from local studies will have relevance across the range of this widely distributed species. RÉSUMÉ (French) L'écologie de la reproduction joue un rôle crucial dans l'aptitude à survivre et l'évolution des oiseaux, mais l'histoire de la vie de base est sous-étudiée pour de nombreuses espèces. Les espèces ayant une large répartition sur une large gamme de latitudes peuvent avoir des stratégies différentes en ce qui concerne la reproduction dans les limites nord et sud de leur aire de répartition, mais ces différences pourraient être négligées en raison de la rareté des informations publiées. L'espèce Salpinctes obsoletus est un oiseau chanteur migrateur au nord de leur repartition, territorial, et monogame dont les populations seraient en déclin. Nous avons collecté des informations sur l'histoire naturelle de 21 couples accouplés d'une population du nord du Colorado pour décrire l'écologie de la nidification et le succès de reproduction. Nous avons évalué les traits d'histoire de vie de nidification et les soins parentaux tout au long de la saison de reproduction pour 12 nids surveillés. Les résultats ont indiqué que 42,9% des nids avaient au moins un poussin, avec des moyennes (±SD) de 5,63 ± 1 œufs par couvée, 3,44 ± 0,53 nouveau-nés par nid et ","PeriodicalId":54404,"journal":{"name":"Wilson Journal Of Ornithology","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2022-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49638628","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":"Aves de Peninsula Valdés/Birds of Peninsula Valdés. 2021.","authors":"Augustin Esmoris","doi":"10.1676/22-00033","DOIUrl":"https://doi.org/10.1676/22-00033","url":null,"abstract":"","PeriodicalId":54404,"journal":{"name":"Wilson Journal Of Ornithology","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2022-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46108573","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":"Vagrancy in Birds.","authors":"Daniel S. Cooper","doi":"10.1676/22-00032","DOIUrl":"https://doi.org/10.1676/22-00032","url":null,"abstract":"","PeriodicalId":54404,"journal":{"name":"Wilson Journal Of Ornithology","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2022-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46089565","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":"First documented molt migration of a wild Trumpeter Swan (Cygnus buccinator)","authors":"Tyler M. Harms, S. Dinsmore","doi":"10.1676/21-00055","DOIUrl":"https://doi.org/10.1676/21-00055","url":null,"abstract":"ABSTRACT Molt migration is an annual movement from the breeding grounds to a different, distant molting area often north of the breeding grounds. Such movements are only completed by a segment of a population, typically nonbreeding individuals or failed breeders. Although molt migration is common among waterfowl, especially large-bodied species such as geese, it remains unknown whether the Trumpeter Swan (Cygnus buccinator), a species whose population is rapidly growing and expanding throughout the mid-continental United States, engages in molt migration. Here, we provide the first empirical description of an apparent molt migration of a nonbreeding male Trumpeter Swan using location data collected by a GPS-GSM collar. The swan departed its natal wetland in north-central Iowa, USA, on 1 June 2019 and arrived at a complex of small wetlands near Great Slave Lake in the Northwest Territories, Canada, on 4 July 2019, a straight-line distance of 2,420 km. For the next 43 d, the swan restricted its movements to a small wetland with a mean distance between sequential points of 126.15 m (range = 0.33–2,910.72 m), suggesting it was flightless during this time period. Both the timing and duration of this presumed flightless period coincide with the second prebasic molt in swans. RESUMEN (Spanish) La muda durante la migración es un movimiento anual del área de reproducción a una diferente área para la muda, frecuentemente al norte de sus áreas reproductivas. Dichos movimientos solamente son completados por un segmento de la población, típicamente individuos no-reproductivos o anidantes fallidos. Aunque la muda durante la migración es común entre aves acuáticas, especialmente especies de tamaño grande como los gansos, aún desconocemos si el cisne Cygnus buccinator, una especie cuya población está creciendo rápidamente y expandiéndose a lo largo de la región continental media de los Estados Unidos, tiene muda de migración. Aquí damos la primera descripción empírica de una aparente muda de migración en un macho no-reproductivo de este cisne, usando datos de localidades colectadas por medio de un collar GPS-GSM. El cisne partió de su humedal natal en Iowa norcentral, EUA, el 1 de junio de 2019 y llegó a un complejo de pequeños humedales cerca del lago Great Slave en Northwest Territories, Canadá, el 4 de julio de 2019, una distancia lineal de 2,420 km. Por los próximos 43 d, el cisne limitó sus movimientos a un pequeño humedal con una distancia lineal entre puntos secuenciales de 126.15 m (rango = 0.33–2,910.72 m), lo que sugiere que no podía volar durante este periodo. Ambos, la temporalidad y duración de este periodo presumiblemente sin volar coinciden con la segunda muda prebásica en cisnes. Palabras clave: aves acuáticas, Iowa, movimiento, reintroducción, transmisor GPS-GSM.","PeriodicalId":54404,"journal":{"name":"Wilson Journal Of Ornithology","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2022-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49459571","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":"Predation risk and settlement decisions by colonially nesting Black Brant (Branta bernicla nigricans)","authors":"Amanda W. Van Dellen, J. S. Sedinger","doi":"10.1676/21-00060","DOIUrl":"https://doi.org/10.1676/21-00060","url":null,"abstract":"ABSTRACT Colonial nesting is associated with numerous costs and benefits that may either increase or decrease fitness of individuals in colonies. Fitness can vary as a function of the location within colonies and individuals may attempt to improve their fitness by changing their nesting location between years. We used a 24 year data set on nest locations within the Tutakoke River Black Brant (Branta bernicla nigricans) colony on the Yukon-Kuskokwim Delta in western Alaska and multi-state capture-mark-recapture models to study the movement of individuals between 2 spatial strata in the colony separated by the Tutakoke River. We found that individuals nesting in a stratum that experienced higher levels of predation by arctic foxes (Vulpes lagopus) were 3 times more likely to move to the other stratum than vice versa, despite slightly higher risk of tidal flooding in the second stratum. These results suggest that Black Brant changed nest locations in an attempt to maximize reproductive fitness and they are consistent with a long-term shift in nest density over the course of the study. RESUMEN (Spanish) La anidación en colonias está asociada con numerosos costos y beneficios que pueden aumentar o reducir la sobrevivencia de individuos en colonias. La sobrevivencia puede variar en función de la localización del nido al interior de la colonia y los individuos pueden intentar mejoras en su sobrevivencia mediante el cambio de sitio de anidación en diferentes años. Usamos un juego de datos de localización de nidos de 24 años en la colonia de gansos Branta bernicla nigricans del río Tutakoke en el delta del Yukon-Kuskokwin en el occidente de Alaska y modelos multiestado de capura-marcado-recaptura para estudiar el movimiento de individuos entre 2 estratos espaciales en la colonia separados por el río Tutakoke. Encontramos que los individuos anidando en un estrato que experimentó mayores niveles de depredación por zorros del Ártico (Vulpes lagopus) tenían una probabilidad 3 veces mayor de moverse al otro estrato que viceversa, aún pese a un ligeramente mayor riesgo de inundación por mareas en el segundo estrato. Estos resultados sugieren que estos gansos cambiaron la ubicación de sus nidos para intentar maximizar su sobrevivencia reproductiva y son consistentes con un cambio a largo plazo en la densidad de nidos a largo plazo a lo largo del periodo de este estudio. Palabras clave: ártico, colonialidad, dispersión, ganso, información privada, información pública, multi-estado.","PeriodicalId":54404,"journal":{"name":"Wilson Journal Of Ornithology","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2022-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45581708","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":"Video evidence of song in a nestling Yellow-rumped Tinkerbird (Pogoniulus bilineatus) supports innate song development in Piciformes","authors":"Sifiso M. Lukhele, C. Widdows, Alexander N. G. Kirschel","doi":"10.1676/21-00072","DOIUrl":"https://doi.org/10.1676/21-00072","url":null,"abstract":"ABSTRACT Most bird species learn their songs by copying those of their parents or those they hear from their natal surroundings. Most non-oscine birds, however, lack the forebrain structure implicated in song learning and are thought to develop songs innately. Yet, evidence of early song development in non-oscines is scant. Here we report on vocalizations emitted by a nestling Yellow-rumped Tinkerbird (Pogoniulus bilineatus) that were recorded by camera trap at a nest cavity in KwaZulu-Natal, South Africa. We obtained 32 video recordings of a nestling singing, from which we measured temporal and spectral characters and compared them with those of adult song. Rudimentary nestling song was remarkably similar to adult song, differing slightly in frequency and the temporal patterning between songs, but with the same temporal patterning within songs. Tinkerbirds thus can sing within 2 weeks post-hatching, supporting the premise that songs develop early and innately in a piciform. RESUMEN (Spanish) La mayoría de las especies de aves aprenden sus cantos copiando los de sus padres o los que escuchan en su entorno. La mayoría de las aves no-oscinas, sin embargo, carecen de la estructura anterior del cerebro implicada en el aprendizaje del canto y se cree que lo desarrollan de forma innata. Aún así, la evidencia del desarrollo prematuro de la canción en aves no-oscinas es escasa. Aquí informamos sobre las vocalizaciones emitidas por un polluelo de barbudo de frente amarilla (Pogoniulus bilineatus) que fueron grabadas por una cámara-trampa en la cavidad de un nido en KwaZulu-Natal, Sudáfrica. Obtuvimos 32 grabaciones de video del canto del polluelo, de las cuales medimos caracteres temporales y espectrales, y los hemos comparado con los del canto de los individuos adultos. El canto rudimentario de los polluelos fue notablemente similar al canto de los adultos, difiriendo levemente en la frecuencia y patrón temporal entre cantos, pero con el mismo patrón temporal dentro de los cantos. Los barbudos, por lo tanto, pueden cantar dentro de las 2 semanas posteriores a la eclosión, lo que respalda la premisa de que las canciones se desarrollan temprano y innatamente en un piciforme. Palabras clave: aprendizaje del canto, barbudos, no-oscinas, ontogenia.","PeriodicalId":54404,"journal":{"name":"Wilson Journal Of Ornithology","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2022-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45752828","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":"Hummingbird Bill Morphology Matched Flower Morphology when Long-Corolla Flowers Provided a Higher Reward","authors":"Elisa Casado Henderson, Zoe K. Osborne, J. Chaves-Campos","doi":"10.1676/21-00010","DOIUrl":"https://doi.org/10.1676/21-00010","url":null,"abstract":"ABSTRACT Specific factors that determine whether hummingbirds feed from flowers matching their bill morphology are not well understood. Here, we asked whether long-billed hummingbirds at tropical mid-elevations visit flowers that match their bill morphology more often when those flowers are more energetically profitable in terms of nectar concentration compared to short-corolla flowers. We measured visitation rates by hummingbirds in 3 experiments involving feeders with 5 flower morphologies and 2 nectar concentrations in the mountains of Costa Rica. Not surprisingly, all species tended to prefer higher nectar concentration when given the choice across all available flower morphologies. When nectar concentration was the same across all flower morphologies, hummingbirds with bills shorter than 28 mm generally avoided long-corolla flowers (30 mm) and fed more frequently from short-corolla flowers (10 mm), while species with longer bills did not show a preference. When nectar concentration was higher in long-corolla flowers compared to short-corolla flowers (30% vs 10% m/v), short-billed species showed the same visitation rates as above, but long-billed species (>28 mm) changed their visitation patterns and visited long-corolla flowers significantly more often than short-corolla flowers. Our results suggest that visitation rates of long-billed hummingbirds to long-corolla flowers might be influenced more by nectar properties than by flower morphology at mid-elevations in the tropics. RESUMEN (Spanish) Los factores específicos que determinan si los colibríes se alimentan de flores que se ajustan a la morfología de su pico no se conocen bien. Aquí, nos preguntamos si los colibríes de pico largo en elevaciones medias tropicales visitan más frecuentemente las flores que se ajustan a su morfología de pico cuando éstas son energéticamente mas rentables en términos de concentración de néctar comparadas con flores de corola corta. Medimos la tasa de visitación de colibríes en 3 experimentos que involucraron comederos con 5 morfologías florales y 2 concentraciones de néctar en las montañas de Costa Rica. Sin que resultara sorprendente, todas las especies prefirieron concentraciones de néctar mas altas en todas las morfologías florales cuando se les dio la opción. Cuando la concentración de néctar fue la misma en todas las morfologías florales, los colibríes con picos mas cortos que 28 mm generalmente evitaron flores de corola larga (30 mm) y se alimentaron mas frecuentemente de flores de corola corta (10 mm), mientras que colibríes de pico mas largo no mostraron preferencia. Cuando la concentración de néctar fue mas alta en flores de corola larga comparada con flores de corola corta (30 vs 10% m/v), las especies de pico corto mostraron los mismos patrones de visitación mencionados arriba, pero las especies de pico largo (>28 mm) cambiaron los patrones de visitación y visitaron las flores de corola larga significativamente con mas frecuencia que las flores de","PeriodicalId":54404,"journal":{"name":"Wilson Journal Of Ornithology","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2022-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47001180","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":"Abundance and evidence of reproduction of Wilson's Plover (Charadrius wilsonia) in northeastern Brazil","authors":"J. P. Tavares-Damasceno, J.L.S. Dantas, J. A. Mobley, R. D. Araújo, M. C. Rodrigues, J. Almeida, M. Pichorim","doi":"10.1676/19-00055","DOIUrl":"https://doi.org/10.1676/19-00055","url":null,"abstract":"ABSTRACT The Wilson's Plover (Charadrius wilsonia) has a broad distribution, occurring in a variety of Atlantic and Pacific coastal and island habitats from North America to Peru and Brazil. This shorebird is considered “Vulnerable” in Brazil, but there is little knowledge regarding the species’ reproductive status, abundance, and distribution in South America. We conducted monthly censuses September 2011–September 2012 and January 2016–December 2017 in different habitats of a 10 km beach transect in the Bacia Potiguar region of northeastern Brazil to address this lack of basic information about the species. Our results indicate considerable variation in abundance, with 1–53 individuals/survey, a greater tendency to be found in mudflat habitats, and breeding in June–December. This information will help to recognize the Bacia Potiguar as an important breeding area for Wilson's Plover in Brazil, provide essential baseline knowledge regarding seasonal abundance and reproductive status of this vulnerable shorebird species, and inform conservation planning for this species in the region. RESUMO (Portuguese) A batuíra-bicuda (Charadrius wilsonia) tem uma ampla distribuição, ocorrendo em uma variedade de habitats costeiros e insulares da Costa do Atlântico e do Pacífico, da América do Norte ao Peru e Brasil. Esta ave limícola é considerada “Vulnerável” no Brasil, e existe pouco conhecimento sobre o status reprodutivo, abundância e distribuição da espécie na América do Sul. Realizamos censos mensais de setembro de 2011 a setembro de 2012 e janeiro de 2016 a dezembro de 2017 em diferentes habitats de um transecto de praia de 10 km na região da Bacia Potiguar, no nordeste do Brasil, para suprir essa falta de informações básicas sobre a espécie. Nossos resultados indicam uma variação considerável na abundância, com 1–53 indivíduos/levantamento, com uma maior tendência a ser encontrada em habitats de lama e um período de nidificação entre junho-dezembro. Essas informações ajudará a reconhecer a Bacia Potiguar como uma importante área de reprodução da batuíra-bicuda no Brasil, fornece um conhecimento básico essencial sobre a abundância sazonal e o status reprodutivo dessa espécie vulnerável de ave limícola, e informa sobre o planejamento da conservação dessa espécie na região. Palavras-chave: abundância, espécie vulnerável, reprodução.","PeriodicalId":54404,"journal":{"name":"Wilson Journal Of Ornithology","volume":null,"pages":null},"PeriodicalIF":0.3,"publicationDate":"2022-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44285872","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}