Ardeola-International Journal of Ornithology最新文献

{"title":"Nest Features and Nesting Niche Segregation in Five Iberian Steppe Passerines","authors":"A. Barrero, Beatriz Cortés Caballero, M. Reverter, J. Gómez‐Catasús, D. Bustillo-de la Rosa, J. Zurdo, C. Pérez‐Granados, J. Traba","doi":"10.13157/arla.70.2.2023.ra4","DOIUrl":"https://doi.org/10.13157/arla.70.2.2023.ra4","url":null,"abstract":"Summary. The co-occurrence of morphologically similar species may be enabled by differences in resource use that limit the effects of interspecific competition, allowing coexistence. This study aimed to evaluate differences in nest structure and to characterise nesting microhabitats to test for nesting niche segregation among sympatric steppe passerines. From 2016 to 2019, we monitored and characterised the nest structure and nesting habitat of 71 nests from five sympatric passerines in shrub steppes in Central Spain: the Eurasian Skylark Alauda arvensis, the Greater Short-toed Lark Calandrella brachydactyla, Dupont's Lark Chersophilus duponti, the Tawny Pipit Anthus campestris and the Western Black-eared Wheatear Oenanthe hispanica. Nest structure was characterised by eight morphometric variables, while principal component analyses (PCA), MANOVA and univariate ANOVA were performed to characterise and evaluate differences in nesting microhabitat between species in both horizontal and vertical dimensions. All species built their nests under short vegetation (< 20cm) and with a similar nest depth. However, there were significant differences among species for some of the considered variables. For example, the three monitored lark species built their nests in areas with lower plant cover compared to the two non-lark species. GLM on PCA axes showed that some species differed in some aspect of nesting niche. In general, the Eurasian Skylark built its nests in areas with higher grassland cover, while the Greater Short-toed Lark selected more open areas, with a higher bare ground cover. Dupont's Lark, the Tawny Pipit and the Western Black-eared Wheatear nested mainly in shrubby areas dominated by chamaephytes. Overall, our results suggest the existence of nesting microhabitat segregation, mainly of the Eurasian Skylark with the rest of the species, which may contribute to explaining the coexistence between species that could potentially compete for nesting sites. This work contributes to understanding how differences in species nest site preferences may facilitate coexistence between similar sympatric species.—Barrero, A., Cortés Caballero, B., Reverter, M., Gómez-Catasús, J., Bustillo-de la Rosa, D., Zurdo, J., Pérez-Granados, C. & Traba, J. (2023). Nest features and nesting niche segregation in five Iberian steppe passerines. Ardeola, 70: 201-224. Resumen. La coexistencia de especies morfológicamente similares puede estar motivada por diferencias en el uso de los recursos que limitan los efectos de la competencia interespecífica, permitiendo la coexistencia. Este estudio tiene como objetivo evaluar las diferencias en la estructura de los nidos y caracterizar los microhábitats de nidificación para probar la segregación del nicho de nidificación entre paseriformes esteparios simpátricos. Entre 2016 y 2019 se monitorizó y caracterizó la estructura del nido y el hábitat de nidificación de 71 nidos de cinco paseriformes simpátricos en estepas arbustivas del","PeriodicalId":55571,"journal":{"name":"Ardeola-International Journal of Ornithology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79229067","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":"Morphometrics of Houbara Bustards Chlamydotis spp: Sexual Size Dimorphism, Seasonal Changes and Differences between Species","authors":"J. Alonso, Thibault Dieuleveut, C. Palacín, I. Abril‐Colón, Alberto Ucero, C. Lucas","doi":"10.13157/arla.70.2.2023.sc2","DOIUrl":"https://doi.org/10.13157/arla.70.2.2023.sc2","url":null,"abstract":"Summary. This study presents for the first time morphometric data from large samples of free-living individuals of Chlamydotis bustards (448 MacQueen's Bustards, 288 African Houbaras, and 53 Canarian Houbaras). Linear measurements were largest in MacQueen's Bustards, intermediate in African Houbaras and smallest in Canarian Houbaras, with differences between the largest and smallest species ranging from 4.5% to 13.9%. Male MacQueen's Bustards were also the heaviest (4% and 15.5% heavier than, respectively, African and Canarian Houbara males) but, unexpectedly, there were no significant weight differences among females of the three bustards. Males of the three bustards were significantly larger than females in all linear measurements and weight. These between-species/subspecies differences are consistent with a slight trend to insular dwarfism that probably selects for smaller size in the Canarian subspecies. Males are larger and heavier than females in the three bustards, as expected in polygynous species, suggesting a moderate effect of sexual selection acting on male size. Finally, the slightly higher sexual size dimorphism values observed in wings and tarsi in MacQueen's bustards compared to both subspecies of African Houbaras are in line with the allometric constraint hypothesis.—Alonso, J.C., Dieuleveut, T., Palacín, C., Abril-Colón, I., Ucero, A. & Lucas, C. (2023). Morphometrics of Houbara Bustards Chlamydotis spp: sexual size dimorphism, seasonal changes and differences between species. Ardeola, 70: 235-247. Resumen. Este estudio presenta por primera vez datos biométricos de muestras significativas de individuos silvestres de avutardas del género Chlamydotis (448 avutardas de MacQueen, 288 hubaras africanas y 53 hubaras canarias). La avutarda de MacQueen presentó las medidas lineales mayores, con valores intermedios en la subespecie nominal de hubara africana y menores en la subespecie insular canaria, con diferencias del 4,5% al 13,9% entre la primera y la última. Los machos de avutarda de MacQueen fueron también los más pesados (un 4% y un 15,5% respectivamente más que los de hubara africana y canaria), pero no hubo diferencias de peso significativas entre las hembras de las tres avutardas. Los machos de las tres avutardas mostraron un tamaño y un peso significativamente mayores que las hembras. Estas diferencias entre especies y subespecies son consistentes con una ligera tendencia al enanismo insular, que probablemente ejerce una selección hacia un menor tamaño en la subespecie canaria. Los machos fueron más grandes y pesados que las hembras en las tres avutardas, como es esperable en especies poligínicas, lo que sugiere un efecto moderado de la selección sexual sobre el tamaño de los machos. Por último, los valores de dimorfismo sexual ligeramente superiores observados en las alas y los tarsos de las avutardas de MacQueen en comparación con las dos subespecies de hubaras africanas están en consonancia con la hipótesis de la restricci","PeriodicalId":55571,"journal":{"name":"Ardeola-International Journal of Ornithology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79736271","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 First Assessment of Birdnet Performance at Varying Distances: A Playback Experiment","authors":"C. Pérez‐Granados","doi":"10.13157/arla.70.2.2023.sc1","DOIUrl":"https://doi.org/10.13157/arla.70.2.2023.sc1","url":null,"abstract":"Summary. Bird vocalisations, like any other acoustic signals, attenuate over distance, and therefore their structure degrades progressively. Such degradation may have an impact on the ability of automated signal recognition software, to detect and correctly identify bird vocalisations. BirdNET is a recently launched automated bird song recogniser commonly employed by researchers and the public. However, few studies have assessed its performance and our current knowledge about how BirdNET performance may vary over distance or with species is very limited. I aimed to evaluate whether BirdNET's ability to correctly identify bird vocalisations of three bird species varied over distance or according to recorder type and target species using a playback broadcast from 10 to 150m away. BirdNET's ability to correctly identify bird songs varied among species and generally decreased over distance but did not vary among recorder types. Overall BirdNET recall rate, defined as the percentage of vocalisations detected, and correctly identified, by the software, was 59.9% (499 vocalisations correctly identified of 840 vocalisations broadcast). A significantly higher number of vocalisations were correctly identified when broadcast at 50m or closer (mean recall rate of 92.2%), when compared to vocalisations broadcast farther than that distance (mean recall rate of 34.9%). Recall rate was also significantly higher for the Grasshopper Sparrow and the Hooded Warbler, when compared to the Gray Vireo. The number of misclassifications varied over distances and did not follow a linear pattern. This study provides valuable information that may contribute to improved surveys and for expanding the use of BirdNET for surveying bird communities using passive acoustic monitoring.—Pérez-Granados, C. (2023). A first assessment of BirdNET performance at varying distances: a playback experiment. Ardeola, 70: 221-233. Resumen. Las vocalizaciones de las aves, como cualquier otra señal acústica, se atenúan con la distancia y, por lo tanto, la estructura de las vocalizaciones de las aves se degrada progresivamente. Tal degradación puede tener un impacto en la capacidad de programas automatizados de reconocimiento de señales a la hora detectar e identificar correctamente las vocalizaciones de las aves. BirdNET es un reconocedor automatizado de cantos de pájaros de reciente creación y comúnmente empleado por investigadores y el público. Sin embargo, pocos estudios han evaluado su rendimiento y nuestro conocimiento actual sobre cómo el rendimiento de BirdNET puede variar en función de la distancia o entre especies es muy limitado. Aquí, mi objetivo era evaluar si la habilidad de BirdNET para identificar correctamente las vocalizaciones de tres especies de aves variaba según la distancia, el tipo de grabadora empleada y entre especies, utilizando una grabación reproducida de 10 a 150 m. La habilidad de BirdNET para identificar correctamente los cantos de las aves varió entre las especies ","PeriodicalId":55571,"journal":{"name":"Ardeola-International Journal of Ornithology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77745053","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-Term Decoupling of a Local Population Trend of the European Pied Flycatcher Ficedula hypoleuca from Nest Box Abundance Indicates the Importance of Old-Growth Forest","authors":"S. Abrahamczyk, Jonatan Grimm, Marvin Fehn, D. Stiels","doi":"10.13157/arla.70.2.2023.ra3","DOIUrl":"https://doi.org/10.13157/arla.70.2.2023.ra3","url":null,"abstract":"Summary. Most populations of the European Pied Flycatcher Ficedula hypoleuca are decreasing. Different reasons for the decline are discussed, including biotic interactions and climate change. It is evident that many studies have been conducted in populations depending completely on nest boxes, but the influence of this artificial support on population dynamics is not well understood. We investigated the population dynamics of the Pied Flycatcher in the Kottenforst, an old-growth forest in western Germany, using recent data as well as historical records. We also determined the proportion of pairs breeding in nest boxes vs. natural nesting places. Specifically, we quantitatively analysed forest structure around tree holes occupied by the Pied Flycatcher. We found a continuous increase in population size since its establishment in the 1960s, which contrasts with overall long-term population trends in Europe as well as the regional trend. Whereas importance of nest boxes decreased over recent years, the majority of pairs are occupying tree holes for breeding, which are abundant in the richly structured, open old-growth forest. This forest structure seems to be optimal for the Pied Flycatcher since it allows flying insects to be hunted close to the nest. Finally, we discuss how forest structure and age as well as tree hole and insect availability may determine population trends of the Pied Flycatcher and highlight the importance of long-term studies. —Abrahamczyk, S., Grimm, J., Fehn, M. & Stiels, D. (2023). Long-term decoupling of a local population trend of the European Pied Flycatcher Ficedula hypoleuca from nest box abundance indicates the importance of old-growth forest. Ardeola, 70: 185-200. Resumen. La mayoría de las poblaciones de papamoscas cerrojillo Ficedula hypoleuca están disminuyendo. Se discuten diferentes razones de este declive, entre ellas las interacciones bióticas y el cambio climático. Es evidente que se han realizado muchos estudios en poblaciones que dependen completamente de las cajas nido, pero no se conoce bien la influencia de este soporte artificial en la dinámica poblacional. Hemos investigado la dinámica poblacional del papamoscas cerrojillo en Kottenforst, un bosque antiguo del oeste de Alemania, utilizando datos recientes y registros históricos. También determinamos la proporción de parejas que crían en cajas nido frente a lugares de nidificación naturales. En concreto, analizamos cuantitativamente la estructura forestal en torno a los huecos de los árboles ocupados por el papamoscas cerrojillo. Encontramos un aumento continuo del tamaño de la población desde su establecimiento en la década de 1960, lo que contrasta con las tendencias poblacionales generales a largo plazo en Europa, así como con la tendencia regional. Mientras que la importancia de las cajas nido ha disminuido en los últimos años, la mayoría de las parejas ocupan agujeros en los árboles para criar, que son abundantes en el bosque antiguo, abierto y rica","PeriodicalId":55571,"journal":{"name":"Ardeola-International Journal of Ornithology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87822100","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":"No Evidence of Deliberate Egg Soiling in the Pied Avocet Recurvirostra avosetta to Improve Camouflage","authors":"C. Ramo, M. Castro, Alejandro Pérez-Hurtado, Nuria Martín, Miguel A. Rendón, J. Amat, G. Liñán-Cembrano","doi":"10.13157/arla.70.2.2023.ra2","DOIUrl":"https://doi.org/10.13157/arla.70.2.2023.ra2","url":null,"abstract":"Summary. Predation is one of the main causes of nest failure in birds. In order to overcome this, many species lay cryptic eggs, which enhances camouflage through either background matching or shape disruption, among other mechanisms. Despite this, ground-nesting birds still suffer high nest predation rates. One possibility to alleviate this could be to soil the eggs with particles of material surrounding nests, improving the camouflage. Indeed, it has been suggested that egg soiling is a mechanism of egg protection, but it remains to be demonstrated whether egg soiling is a strategy used by birds or is an unintentional by-product after incubating adults enter nests with dirty feet, legs and/or plumage. In this study, we analysed images from infra-red camera traps placed beside Pied Avocet Recurvirostra avosetta nests, in which we had previously cleaned dirty eggs and provided mud with which the adults might have soiled the eggs, and we found no evidence of deliberate egg soiling in this case. There was a slight improvement (not statistically significant) in the camouflage of soiled avocet eggs in comparison to clean eggs, but only in one of two studied nesting sites in which the eggs were more soiled. Although egg soiling may result in improved camouflage, future studies should address its potential costs to establish why it has not apparently evolved as a deliberate strategy to improve egg camouflage in nesting shorebirds.—Ramo, C., Castro, M., Pérez-Hurtado, A., Martín, N., Rendón, M.A., Amat, J.A. & Liñán-Cembrano, G. (2023). No evidence of deliberate egg soiling in the Pied Avocet Recurvirostra avosetta to improve camouflage. Ardeola, 70: 169-184. Resumen. La predación es una de las causas principales del fracaso de nidos de aves. Para superar esto, muchas especies ponen huevos crípticos, lo que mejora el camuflaje mediante similitud con el fondo o alteración en la percepción de las formas, entre otros mecanismos. A pesar de esto, particularmente las aves que nidifican en el suelo sufren altas tasas de predación de nidos. Una posibilidad para aliviar esto consistiría en ensuciar los huevos con partículas del material que rodea los nidos, lo que mejoraría el camuflaje. De hecho, se ha sugerido que el ensuciamiento es un mecanismo de protección de los huevos, pero queda pendiente de demostración si el mismo es una estrategia usada por las aves o es un resultado colateral no intencionado como consecuencia de que las aves entren a incubar con las patas o el plumaje sucios. En este estudio analizamos imágenes de cámaras-trampa infrarrojas colocadas junto a nidos de avoceta común Recurvirostra avosetta, en las que previamente habíamos limpiado los huevos que estaban sucios y suministrado barro con el que los adultos podrían ensuciar los huevos. No encontramos evidencia de que el ensuciamiento de huevos sea una estrategia deliberada usada por las avocetas. El camuflaje de los huevos mejoró ligeramente (aunque no fue estadísticamente significativo) ","PeriodicalId":55571,"journal":{"name":"Ardeola-International Journal of Ornithology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87494439","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":"Temporal Patterns of Cooing Activity of the European Turtle-Dove Streptopelia turtur: Optimising Monitoring Schemes Based on Abundance Indices","authors":"B. Arroyo, Lara Moreno-Zarate, Mario Fernández-Tizón, F. Sardà‐Palomera, G. Bota, F. Mougeot","doi":"10.13157/arla.70.2.2023.ra1","DOIUrl":"https://doi.org/10.13157/arla.70.2.2023.ra1","url":null,"abstract":"Summary. Surveys based on abundance indices may still be the most cost-efficient method for monitoring programmes that aim to be extensive in time or space, but it is important to take into account differences in activity patterns when combining data collected at different times or from different areas. The European Turtle-dove Streptopelia turtur is a migratory game species that has declined in recent decades and for which identifying efficient and easy-to-apply monitoring schemes to assess changes in abundance is critical for adaptive management. We describe variation in cooing activity to help optimising Turtle Dove abundance monitoring schemes based on point-counts of cooing males. Cooing activity (number of minutes during a ten-minute sampling period when each Turtle Dove was cooing) declined markedly and linearly throughout the morning; in addition, it increased slightly from May to late June, and declined abruptly in the second half of July. The number of different turtle doves detected per ten-minute period significantly declined with time since dawn and was markedly lower after mid-July. Predicted abundance per observation point at dawn on 25 June (from a GLM per region including time and a quadratic relationship with date), correlated tightly (r = 0.95) with the average number of turtle doves detected at each point over multiple visits during the breeding season. Correlation of the latter with the number of birds observed in a single visit during the breeding period was weaker (0.68 ± 0.02). Estimated abundance per point was higher the longer the monitoring bout duration, but five-minute periods allowed detecting c. 80% of birds detected during ten-minute periods. To optimize Turtle Dove abundance monitoring schemes based on abundance indices, we suggest implementing five-minute samplings from mid-May to mid-July during the first three hours after dawn, and transforming the observed values into predicted values considering the date and time at which surveys were made, to obtain comparable results across observation points and years.—Arroyo, B., Moreno-Zarate, L., Fernández-Tizón, M., Sardà-Palomera, F., Bota, G. & Mougeot, F. (2023). Temporal patterns of cooing activity of the European Turtle-dove Streptopelia turtur: optimising monitoring schemes based on abundance indices. Ardeola, 70: 151-168. Resumen. Los muestreos basados en índices de abundancia pueden ser el método más eficiente en programas de monitorización que pretendan ser extensos en el tiempo o el espacio, pero es importante tener en cuenta las posibles diferencias espaciales o temporales en los patrones de actividad cuando se combinan datos recopilados en diferentes momentos o áreas. La tórtola europea Streptopelia turtur es una especie cinegética migratoria que ha disminuido de forma importante en las últimas décadas, y para la cual es fundamental identificar sistemas de monitorización eficientes y fáciles de implementar para evaluar cambios de abundancia para un manejo a","PeriodicalId":55571,"journal":{"name":"Ardeola-International Journal of Ornithology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74122223","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":"In Memoriam","authors":"S. Merino","doi":"10.13157/arla.70.2.2023.im","DOIUrl":"https://doi.org/10.13157/arla.70.2.2023.im","url":null,"abstract":"T year 1994 was coming to an end when I received a call from a researcher from the Spanish National Research Council (CSIC) asking me if I could spend the next two months working on a project on penguins in Antarctica. It seemed like a joke, but it wasn’t. The principal investigator of the research project, Juan Moreno, had suddenly felt unwell and had to return to Spain to go to the doctor. It was difficult to find a substitute willing to embark on a trip to the extreme south of the world in just a few days and with availability during that time. The search had proved fruitless until my thesis advisor, Jaime Potti, who was in Antarctica collaborating on the project, suggested my name. He could not stay longer since he had to attend his classes at the University of Alcalá de Henares so, despite my inexperience, I was “the candidate”. Lali Moreno, the researcher at the other end of the phone, gave me the instructions to acquire the necessary equipment for such an adventure. Before I could realise it, I was crossing the Atlantic in a plane bound for Punta Arenas, in southern Chile. There I met Juan and Jaime, who embarked me on the ship Hesperides, ready to sail to Deception Island. A few days later the ship entered the inner bay of the small horseshoeshaped island, and we saw the buildings of the Spanish Antarctic Base “Gabriel de Castilla”. The material and personnel that had to disembark at the base were transferred in a zodiac. I remember perfectly how we stood on that dark pyroclastic sand that revealed the volcanic Ardeola 70(2), 2023, 141-150 DOI: 10.13157/arla.70.2.2023.im","PeriodicalId":55571,"journal":{"name":"Ardeola-International Journal of Ornithology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90466169","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":"Observaciones de Aves Raras en España (Agosto 2020 - Agosto 2022)","authors":"L. De, A. Yanqui, M. Moreno, V. encejo, G. Africano, N. García, E. Reyes, G. A. C. Paragallinula, C. O. D. A. LASkA, DE MCOMITé, DE RAREzAS, LA Sociedad, Española DE ORNITOLOGíA, Alberto Benito canastera alinegra Glareola, Cabo Peñas, M. Antonio., J. A. Romero, P. Sánchez, M. Gigante, DeL Amur","doi":"10.13157/arla.70.1.2023.rb","DOIUrl":"https://doi.org/10.13157/arla.70.1.2023.rb","url":null,"abstract":"Este es el informe número 35 del Comité de Rarezas (CR), y recoge los datos recopilados entre el 1 de agosto de 2020 y el 31 de agosto de 2022, además de algunos referentes a años previos. Se pueden consultar los informes bimestrales en https://seo.org/informes-rarezas/. El presente informe publica 79 registros estudiados y aceptados por el Comité de Rarezas (CR), relativos a todas aquellas especies con menos de diez citas históricas en España observadas durante el tiempo que comprende este trabajo. Incluye un total de 48 taxones de aves consideradas rareza en el conjunto de España, seleccionadas por ser las especies más raras observadas durante el período comprendido en este informe. Entre estas citas, incluye 9 nuevas especies para España: avefría coliblanca, albatros clororrinco, mochuelo chico, búho nival, cernícalo del Amur, urraca magrebí, calandria bimaculada, escribano enmascarado y chingolo gorgiblanco. Estructura del informe: Se ordenan las citas por fecha (de más antigua a más moderna), y se agrupan por zonas geográficas (Cantábrico y Galicia, Meseta, Sur, Pirineos, Mediterráneo, Norte de África y Canarias).","PeriodicalId":55571,"journal":{"name":"Ardeola-International Journal of Ornithology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85485709","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":"Factors Shaping Occurrence Probability of a Generalist Raptor Species across an Urban-Rural Gradient","authors":"Nerea Pagaldai, Javier Rodríguez‐Pérez, Arkaitz Arnaiz, J. Arizaga","doi":"10.13157/arla.70.1.2023.ra4","DOIUrl":"https://doi.org/10.13157/arla.70.1.2023.ra4","url":null,"abstract":"Summary. Urbanization constitutes one of the most intensive and fast spreading factors explaining biodiversity loss worldwide. The extension of urban areas and landscape configurations affects the ability of raptors to exploit urban patches. The Tawny Owl Strix aluco is a forest-dwelling nocturnal species with a wide distribution range that is well-adapted to urban environments. However, it remains unknown which habitat factors explain its presence in urban-associated landscapes. Our main objective is to determine the effect of urban landscapes on the probability of occurrence of Tawny Owls along an urban-rural gradient. It is expected that Tawny Owls will be able to use urban patches that have (1) at least 30% tree cover thanks to gardens/parks for hunting but (2) they will not use those with high noise levels (i.e., highways). Our research was carried out in the municipality of Donostia-San Sebastian in the Basque Country, Northern Spain. Data were obtained from a survey conducted in 2017. The municipality was divided into 329 square cells, of which 251 were surveyed. Tawny Owls were detected in 141 cells, and we found that nocturnal noise level and scrub cover contributed most to explaining the probability of Tawny Owl occurrence; with nocturnal noise having a significant negative effect on occurrence probability, and scrub cover a positive effect, probably because the species uses open or semi-open areas to hunt (but woodland to breed). Overall, it can be concluded that the very noisy and/or urbanized parts of the city comprised a non-optimal habitat for the species.—Pagaldai, N., Rodríguez-Pérez, J., Arnaiz, A. & Arizaga, J. (2023). Factors shaping occurrence probability of a generalist raptor species across an urban-rural gradient. Ardeola, 70: 75-88. Resumen. La urbanización es una de las causas más intensivas y rápidas que explican la pérdida de biodiversidad a nivel mundial. La extensión de las áreas urbanas y la configuración del paisaje afectan la habilidad de las rapaces para explotar parches urbanos. El cárabo euroasiático Strix aluco es una especie forestal nocturna con una amplia distribución y bien adaptada a los ambientes urbanos. Sin embargo, siguen siendo desconocidos qué factores relacionados con el hábitat explican su presencia en ambientes urbanizados. Nuestro objetivo general es el de determinar el efecto que tienen los paisajes urbanos en la probabilidad de presencia del cárabo euroasiático a lo largo de un gradiente urbano-rural. Se espera que el cárabo sea capaz de usar los parches urbanos que tengan (1) un mínimo número de jardines/parques con árboles para cazar; y (2) un limitado nivel de ruido durante la noche (ej. autopistas). Nuestro estudio se llevó a cabo en Donostia-San Sebastián, en el País Vasco, norte de España. Los datos se obtuvieron mediante un censo realizado en 2017. El municipio se dividió en 329 cuadrículas y 251 de ellas fueron censadas. Se detectaron cárabos en 141 cuadrículas, y obtuvimos que el ruid","PeriodicalId":55571,"journal":{"name":"Ardeola-International Journal of Ornithology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74498169","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":"Survival, Dispersal and Initial Migratory Movements of Juvenile Great Spotted Cuckoos Clamator glandarius","authors":"Nerea Martínez-Zunzarren, Francisco Ruiz-Raya, T. Pérez-Contreras, M. Soler, J. D. Ibáñez-Álamo","doi":"10.13157/arla.70.1.2023.ra3","DOIUrl":"https://doi.org/10.13157/arla.70.1.2023.ra3","url":null,"abstract":"Summary. The Great Spotted Cuckoo Clamator glandarius belongs to the family Cuculidae, whose biology has been intensively studied for years, particularly in the context of avian brood parasitism. However, there are still important gaps in knowledge of its biology. Recent studies have highlighted the absence of information about survival, dispersal and migratory routes of juveniles, and the main aim of this study was to contribute to filling this gap. We used radio-transmitters and satellite tags (PTTs) to study the initial movements of juvenile Great Spotted Cuckoos in the study area (i.e. breeding territories), as well as their long-distance migratory movements. We found that a large proportion of marked individuals died in the study area within days or weeks of leaving the nest, with direct and indirect evidence suggesting that predation is the main cause of mortality. Our results suggest that pre-migratory movements of juveniles, i.e., those carried out before leaving the Iberian Peninsula, are different from those previously found for experienced adults. The high predation rate in the study area meant that only three of 13 satellite-tagged juveniles initiated migration to their wintering area in sub-Saharan Africa, using the Eastern Atlantic route. Overall, the information provided here contributes to a better understanding of the biology of juvenile great Spotted Cuckoos and could be useful in addressing potential future conservation problems.—Martínez-Zunzarren, N., Ruiz-Raya, F., Pérez-Contreras, T., Soler, M. & Ibáñez-Álamo, J.D. (2023). Survival, dispersal and initial migratory movements of juvenile Great Spotted Cuckoos Clamator glandarius. Ardeola, 70: 59-74. Resumen. El críalo europeo Clamator glandarius es un ave perteneciente a la familia Cuculidae cuya biología se ha estudiado intensamente durante años, sobre todo en el contexto del parasitismo de cría. Sin embargo, todavía existen importantes lagunas en el conocimiento de la biología de esta especie. Estudios recientes han puesto de manifiesto la ausencia de información sobre la supervivencia, la dispersión y las rutas migratorias en los juveniles de esta especie, por lo que el objetivo principal de este estudio es contribuir a llenar este vacío. Para ello, utilizamos radiotransmisores y emisores satélite tipo PTT para estudiar tanto los primeros movimientos en el área de cría, así como los movimientos migratorios de larga distancia de los juveniles de críalo europeo, respectivamente. Comprobamos que una parte importante de los individuos marcados murieron en el área de cría pocos días después de abandonar el nido, con evidencias directas e indirectas que apuntan a la depredación como la principal causa de mortalidad. Nuestros resultados sugieren que los movimientos premigratorios de los juveniles (es decir, los movimientos realizados antes de abandonar la península ibérica) son relativamente diferentes a los encontrados anteriormente para los adultos de esta especie. La elevada t","PeriodicalId":55571,"journal":{"name":"Ardeola-International Journal of Ornithology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2023-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84855423","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}