Sheela P. Turbek, Alexandria Polich, Christen M. Bossu, Christine Rayne, Amanda Carpenter, Genaro Rodríguez Otero, Sergio Gómez Villaverde, Fabiola Rodríguez Vásquez, Blanca E. Hernández-Baños, John McCormack, Kristen Ruegg
{"title":"Genetic analysis of museum samples suggests temporal stability in the Mexican nonbreeding distribution of a neotropical migrant","authors":"Sheela P. Turbek, Alexandria Polich, Christen M. Bossu, Christine Rayne, Amanda Carpenter, Genaro Rodríguez Otero, Sergio Gómez Villaverde, Fabiola Rodríguez Vásquez, Blanca E. Hernández-Baños, John McCormack, Kristen Ruegg","doi":"10.1111/jav.03369","DOIUrl":"10.1111/jav.03369","url":null,"abstract":"<p>Seasonal migration is highly labile from an evolutionary perspective and known to rapidly evolve in response to selective pressures. However, long-distance migratory birds rely partially on innate genetic programs and may be constrained in their ability to alter their migratory behavior. We take advantage of recent advances in our ability to genotype historical DNA samples to examine the temporal stability of migratory connections between breeding and nonbreeding populations (i.e. migratory connectivity) and population-level nonbreeding distributions in the Wilson's warbler <i>Cardellina pusilla</i>, a long-distance migratory songbird. By assigning historical and contemporary samples collected across the nonbreeding range to genetically distinct breeding clusters, we suggest that broad-scale population-level nonbreeding distributions within this species have remained largely consistent within Mexico from the mid-1900s to the present day. These findings support the idea that the nonbreeding distributions of long-distance migrants may remain stable over long time scales, even in the face of rapid environmental change.</p>","PeriodicalId":15278,"journal":{"name":"Journal of Avian Biology","volume":"2025 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jav.03369","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143248633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
María Dolores Barón, Mark Stanback, Ester Martínez-Renau, Juan José Soler, Manuel Martín-Vivaldi
{"title":"Characterizing bacterial communities of wild birds: Insights from three southern African hornbill species","authors":"María Dolores Barón, Mark Stanback, Ester Martínez-Renau, Juan José Soler, Manuel Martín-Vivaldi","doi":"10.1111/jav.03347","DOIUrl":"10.1111/jav.03347","url":null,"abstract":"<p>The microbiome of the uropygial gland and integuments where birds spread the uropygial secretion may play crucial roles for their hosts, but it has been poorly studied, especially in wild species. Exploring bacterial communities associated with the uropygial secretion of birds is particularly interesting in species under strong selection pressures due to pathogenic infection. Here, by high-throughput 16S rRNA amplicon sequencing, we characterized and compared the bacterial communities of the uropygial gland surface of three African hornbill species (Family Bucerotidae), as well as the bill and feathers of females from two of these species and the nestlings of the other one. In accordance with previous knowledge of avian microbiomes, we expected to find differences associated with species identity, age and the sampled integument. Overall, we found that: 1) the microbiome was similar among species, 2) but there were slight differences associated with the sampled body regions. Moreover, 3) we observed no consistent variation in the microbiota with age, and 4) females and nestlings sharing a nest harboured more similar gland surface microbiota compared to females and nestlings that did not share a nest. These species often reuse nest cavities, sealing them with a plug made from diverse material. Once sealed, they remain enclosed in the nest for a long period. This behaviour opens the possibility that the nest environment is key shaping the microbiota of these species and might serve as a reservoir of the sampled bacterial communities. Moreover, behavioural mechanisms such as preening may contribute to the transmission of bacteria from the uropygial gland to other body regions, enhancing bacterial similarities. This study contributes to our understanding of the role of the nest environment in structuring bacterial communities in wild birds and provides the first thorough characterization of the microbiome inhabiting different body integuments of southern African hornbills.</p>","PeriodicalId":15278,"journal":{"name":"Journal of Avian Biology","volume":"2025 3","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jav.03347","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143944937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Andrew C. Katsis, Lauren K. Common, Jonas Lesigang, Avila Bold, Marie Fröhlich, Jana-Marie Schmincke, Didone Frigerio, Sonia Kleindorfer
{"title":"Flight initiation distance is repeatable and geographically flexible in greylag geese Anser anser","authors":"Andrew C. Katsis, Lauren K. Common, Jonas Lesigang, Avila Bold, Marie Fröhlich, Jana-Marie Schmincke, Didone Frigerio, Sonia Kleindorfer","doi":"10.1111/jav.03288","DOIUrl":"10.1111/jav.03288","url":null,"abstract":"<p>The decision to flee from an approaching threat represents a trade-off between the costs and benefits of flight. In research to date, particular interest has been given to the effects of urbanisation on predator escape behaviour. However, these differences are most often studied at the population rather than individual level, which makes it difficult to disentangle whether site-specific differences in predator avoidance are due to behavioural plasticity or non-random distribution of behavioural phenotypes. In this study, we measured flight initiation distances – a widely used proxy for fearfulness or boldness – in a free-roaming, human-habituated, and colour-banded population of greylag geese <i>Anser anser</i>. First, we tested whether individuals flexibly adjusted their flight initiation distance based on environmental context by approaching the same individuals at two sites with different levels of human presence. Second, we examined whether flock members show consistent differences in their flight initiation distance towards unfamiliar humans. Our results suggest that greylag geese can adjust their behaviour based on environmental context and show individual differences in flight initiation distance that are consistent both within and across years. When individuals regularly move between foraging sites, establishing site-specific responses to potential threats may allow them to optimise their escape response and thereby avoid unnecessary energetic and opportunity costs.</p><p>Keywords: <i>Anser anser</i>, behavioural plasticity, boldness, escape behaviour, flight initiation distance</p>","PeriodicalId":15278,"journal":{"name":"Journal of Avian Biology","volume":"2025 3","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jav.03288","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144190641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"No support for solar radiation as a major evolutionary driver of malar stripes in falcons","authors":"Michelle Vrettos, Chevonne Reynolds, Arjun Amar","doi":"10.1111/jav.03322","DOIUrl":"10.1111/jav.03322","url":null,"abstract":"<p>The malar stripes of falcons (<i>Falco</i> spp.) are often hypothesised to function by reducing the amount of solar glare reflected into the falcon's eyes while hunting, thereby aiding foraging efficiency in bright conditions. This ‘solar glare hypothesis' is supported by intraspecific trends in peregrine falcons <i>Falco peregrinus</i>, in which populations inhabiting regions of higher average annual solar radiation exhibit larger and darker malar stripes on average. Here, we extend the methodological approach previously used in peregrine falcons to examine both intra- and interspecific relationships between solar radiation and malar stripe morphology across all extant falcon species, thereby providing a more robust test of the hypothesis that falcon malar stripes evolved as an adaptation against negative visual effects of solar glare. We obtained web-sourced photographs of all extant falcon species, taken across each species' geographic range, and related mean breeding season solar radiation at each photograph location to the size and darkness of the birds' malar stripes, simultaneously testing for intraspecific and interspecific relationships between malar stripe characteristics and solar radiation, and including phylogeny and relevant ecological traits as covariates. We found no consistent interspecific relationship between solar radiation and malar stripe characteristics Likewise, in 38 out of 39 species, malar stripe characteristics were not positively intraspecifically related to solar radiation, with only peregrine falcons showing trends towards larger and darker malar stripes in brighter regions. Falcon malar stripes are thus unlikely to represent an adaptation against visual effects of solar glare, and their adaptive significance is more likely to be explained by crypsis or social signalling, if indeed they do represent an adaptive trait. Malar stripes may have become co-opted for solar glare reduction in peregrine falcons due to the species' specialisation for high-speed aerial hunting, although the intraspecific patterns observed may alternately be explained by phylogeography.</p><p>Keywords: avian colouration, dark eye markings, facial plumage, falcon, malar stripe, solar glare</p>","PeriodicalId":15278,"journal":{"name":"Journal of Avian Biology","volume":"2025 3","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jav.03322","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143944964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Joshua C. Gil, Heather R. Skeen, Celeste Cuellar, Sarah M. Hird
{"title":"Canada goose fecal microbiota correlate with geography more than host-associated factors","authors":"Joshua C. Gil, Heather R. Skeen, Celeste Cuellar, Sarah M. Hird","doi":"10.1111/jav.03360","DOIUrl":"10.1111/jav.03360","url":null,"abstract":"<p>Gut microbiota interact with host biology in numerous important ways. The forces shaping the composition, diversity, and function of the microbiota vary within and between species. Avian microbiota often correlate more strongly with sampling location specific environmental variables than with host-associated factors such as age, but robust, range-wide sampling is rare. To better understand the connection between geographic distance and the microbiota, fecal samples were collected from non-migratory Canada goose populations across the United States. We expected that geographically closer populations would be exposed to more similar environmental microbes and would therefore have more similar gut microbiota. We hypothesized that intrinsic host-associated factors would have a weak correlation to gut microbial composition and geographic distance would have a stronger correlation. We found that some components of Canada goose microbiota are present in a majority of the geese, including four bacterial phyla, five families, and three genera. However, there were significant differences in microbial alpha diversity based on state of origin as well as significant positive correlations between geography and beta diversity. Supervised machine learning models were able to predict the state and flyway of origin of a fecal sample based on bacterial composition alone. Distance−decay analysis showed a significant positive relationship between geographic distance and beta diversity. Our work provides novel insights into the microbiota of the Canada goose and supports the hypothesis that avian microbiota are influenced by the host's environment. This work also suggests that there is a minimum geographic distance, likely associated with sufficient variation in habitat, climate, and local food sources, that must be reached before significant differences in the microbiota between two populations can be detected.</p>","PeriodicalId":15278,"journal":{"name":"Journal of Avian Biology","volume":"2025 3","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jav.03360","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143944963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Matthew J. Hardy, Christopher K. Williams, Brian S. Ladman, Maurice E. Pitesky, Cory T. Overton, Michael L. Casazza, Elliott L. Matchett, Diann J. Prosser, Jeffrey J. Buler
{"title":"Examining inter-regional and intra-seasonal differences in wintering waterfowl landscape associations among Pacific and Atlantic flyways","authors":"Matthew J. Hardy, Christopher K. Williams, Brian S. Ladman, Maurice E. Pitesky, Cory T. Overton, Michael L. Casazza, Elliott L. Matchett, Diann J. Prosser, Jeffrey J. Buler","doi":"10.1111/jav.03296","DOIUrl":"10.1111/jav.03296","url":null,"abstract":"<p>The Central Valley of California (CVC) and Mid-Atlantic (MA) in the U.S. are both critical sites for nationwide food security, and many waterfowl species annually, especially during the winter, providing feeding and roosting locations for a variety of species. Mapping waterfowl distributions, using NEXRAD, may aid in the adaptive management of important waterfowl habitat and allow various government agencies to better understand the interface between wild and domestic birds and commercial agricultural practices. We used 9 years (2014–2023) of data from the US NEXRAD network to model winter waterfowl relative abundance in the CVC and MA as a function of weather, temporal period, environmental conditions, and landcover characteristics using boosted regression tree modelling. We were able to quantify the variability in effect size of 28 different covariates across space and time within two geographic regions which are critical to nationwide waterfowl management and host a high density of nationally important commercial agriculture. In general, weather, geographic (distance to features), and landcover condition (wetness index) predictors had the strongest relative effect on predicting wintering waterfowl relative abundance in both regions, while effects of land cover composition were more regionally and temporally specific. Increased daily mean temperature was a major predictor of increasing relative waterfowl abundance in both regions throughout the winter. Increasing precipitation had differing effects within regions, increasing relative waterfowl abundance in the MA, while decreasing in general within the CVC. Increasing relative waterfowl abundance in the CVC are strongly tied to the flooding of the landscape and rice availability, whereas waterfowl in the MA, where water is less limiting, are generally governed by waste grain availability and emergent wetland on the landscape. Waterfowl relative abundance in the MA was generally higher nearer to the Atlantic coast and lakes, while in the CVC they were higher nearer to lakes. Our findings promote a better understanding of spatial associations of waterfowl to landscape features and may aid in conservation and biosecurity management protocols.</p>","PeriodicalId":15278,"journal":{"name":"Journal of Avian Biology","volume":"2025 3","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jav.03296","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143944959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ana Busi, Estefani T. Martínez-Sánchez, Johnathan Alvarez-Londoño, Dimas A. Molina-Marin, Juan F. Betancurt-Grisales, Fredy A. Rivera-Páez, Héctor E. Ramírez-Chaves, Francisco E. Fontúrbel, Gabriel J. Castaño-Villa
{"title":"Life history traits, habitat characteristics, and phylogeny influence tick infestation probability in tropical wild birds","authors":"Ana Busi, Estefani T. Martínez-Sánchez, Johnathan Alvarez-Londoño, Dimas A. Molina-Marin, Juan F. Betancurt-Grisales, Fredy A. Rivera-Páez, Héctor E. Ramírez-Chaves, Francisco E. Fontúrbel, Gabriel J. Castaño-Villa","doi":"10.1111/jav.03315","DOIUrl":"10.1111/jav.03315","url":null,"abstract":"<p>Interactions between wild birds and ticks exert significant selective forces, influencing the host's evolution and fitness. Tick infestation rates vary among bird species due to life history and morphology. Understanding tick infestation probability is crucial for conservation efforts, as birds play an important role in the tick life cycle and can transmit tick-borne pathogens. In this context, it is essential to understand how life history traits or phylogenetic relationships determine tick infestation probability in the tropics. This study aims to identify wild bird life history traits and habitat characteristics associated with tick infestation probability in the Colombian tropical region. We hypothesized that larger body size, migratory behavior, foraging in lower vegetation stratum, seasonal aggregation, and inhabiting natural habitats increase tick infestation probability. We used a dataset with 3488 wild bird records from 322 species and 41 families, obtained from 61 Colombian localities (26 in the Orinoquia and 35 in the Andean regions). We used phylogenetic generalized linear mixed Bayesian models to assess tick infestation probability based on life history traits, body size, and geographic distribution. Of the birds analyzed, 3.2% were infested by ticks, mainly in immature stages (95%). Our results indicated a lower probability of tick infestation in agricultural habitats and higher elevations. Ground-foraging species exhibited a lower infestation probability, contrary to previous reports. We found a significant phylogenetic relationship, indicating that related species have similar probabilities of tick infestation compared to more distantly related species. This study provides valuable insights into the bird–tick association, with implications for disease management and bird conservation.</p>","PeriodicalId":15278,"journal":{"name":"Journal of Avian Biology","volume":"2025 3","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jav.03315","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143944954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Galactose-α-1,3-galactose-presenting bacterial families are associated with resistance to experimental avian malaria infection","authors":"R. K. Noble, T. R. Kelly, C. R. Lattin","doi":"10.1111/jav.03330","DOIUrl":"10.1111/jav.03330","url":null,"abstract":"<p>The gut microbiome can contribute to host health through defense against pathogens. However, links between the host gut microbiome and resistance to infection have been primarily investigated in humans and lab-bred rodents, so we do not know to what extent this relationship exists in wild animals. To fill this knowledge gap, we used an experimental malaria inoculation with <i>Plasmodium relictum</i> in wild-caught house sparrows <i>Passer domesticus</i> (n = 18) to examine interactions of the host gut microbiome and resistance to avian malaria infection. Before and after inoculation, we collected blood samples to quantify circulating parasitemia and fecal samples to evaluate the gut microbiome through amplification and sequencing of the V4 region of the bacterial 16S rRNA gene. We found that gut microbiome alpha diversity (species richness and evenness) and beta diversity (community composition) were not significantly different between infected and resistant sparrows prior to or during malaria infection. However, we identified several indicator ASVs that occurred at higher prevalence and proportional abundance in malaria-resistant sparrows, most of which were from the family Lactobacillaceae that is hypothesized to confer resistance to malaria through inducing the production of anti-α-Gal antibodies. Future studies should experimentally manipulate the composition of the avian gut microbiome to causally investigate the relationship between specific bacterial taxa in the host gut microbiome and resistance to avian malaria infection.</p>","PeriodicalId":15278,"journal":{"name":"Journal of Avian Biology","volume":"2025 3","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jav.03330","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143944558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tjomme van Mastrigt, Kevin D. Matson, Sander Lagerveld, Xinrou S. Huang, Willem F. de Boer, Henk P. van der Jeugd
{"title":"Effects of immune status on stopover departure decisions are subordinate to those of condition, cloud cover and tailwind in autumn-migrating common blackbirds Turdus merula","authors":"Tjomme van Mastrigt, Kevin D. Matson, Sander Lagerveld, Xinrou S. Huang, Willem F. de Boer, Henk P. van der Jeugd","doi":"10.1111/jav.03368","DOIUrl":"10.1111/jav.03368","url":null,"abstract":"<p>Migratory birds encounter a large variety of parasites and pathogens en route and invest in immune defences to limit the risk and fitness costs of infection. Since both migration and immune defences carry costs, individuals on tight budgets may face trade-offs between migratory progress and immune status. Many species alternate legs of strenuous migratory flight with stopovers during which birds refuel, rest, and recover physiologically. Despite this, most time and energy consumed during migration are actually spent on stopovers. As a result, identifying what determines stopover duration is key in understanding how migratory birds balance investments in immune defences and migration. Yet, it is unknown under what conditions an individual's immune status may affect migratory progress through the duration of stopovers. We explored whether immune status at arrival affects stopover duration by radio-tagging and blood-sampling common blackbirds <i>Turdus merula</i> during autumn stopovers on the Dutch island of Vlieland. To measure immune status, we quantified levels of bacterial killing ability, natural antibodies, complement, and haptoglobin, as well as heterophil–lymphocyte ratios. We show that stopover departures peaked during periods with low cloud cover and strong tailwinds. While lean birds prolonged stopovers, we only found a weak tendency of prolongation in birds with elevated haptoglobin levels. We conclude that effects of immune status on minimum stopover durations are subordinate to those of condition, cloud cover, and tailwinds in autumn-migrating common blackbirds. Hence, future studies on the link between immune defences and stopover durations should take weather conditions into account.</p>","PeriodicalId":15278,"journal":{"name":"Journal of Avian Biology","volume":"2025 2","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jav.03368","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143595431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Eleanor Marie Rivers, Mike J. Short, Andy Page, Peter M. Potts, Kathy Hodder, Andrew Hoodless, Rob Robinson, Richard Stillman
{"title":"Factors influencing nest site selection in a rapidly declining shorebird, the Eurasian curlew","authors":"Eleanor Marie Rivers, Mike J. Short, Andy Page, Peter M. Potts, Kathy Hodder, Andrew Hoodless, Rob Robinson, Richard Stillman","doi":"10.1111/jav.03286","DOIUrl":"10.1111/jav.03286","url":null,"abstract":"<p>In this period of rapid human-induced environmental change, it is vital that influences of habitat on the distribution and productivity of threatened species are understood. Ground-nesting birds are declining more rapidly across Europe than any other group, with large-bodied birds at the greatest risk of extinction. Productivity and adult survival cannot both be maximised concurrently, and individuals will make decisions during the nest-placement phase which will favour one outcome or the other; however, under conditions of accelerating change, these decision processes may become decoupled from positive fitness outcomes. The Eurasian curlew <i>Numenius arquata</i> is Europe's largest wader and is showing steep declines in breeding productivity. Curlews are known to use a diverse range of habitats for nesting, where anthropogenic or natural features may influence distribution. There is an urgent need to understand the spatial scales of these impacts, and whether habitat characteristics have a positive or negative impact on nest survival. In our study site in southern England, curlew showed a marked preference for nesting in wetter habitats, primarily mire, and a weaker selection of dry heathland. Nest survival improved in wetter habitats, and the area of mire round a nest site was positively associated with increased levels of nesting success, whilst area of scrub had a negative association. Woodland significantly excluded curlew from potentially suitable breeding habitat, with an impact observed up to 2 km from the nest site, but nest survival did not improve with distance from woodland. Curlews strongly avoided nesting near a major road passing through the study site, despite seemingly suitable habitat nearby. Understanding landscape effects will assist in planning future habitat management for curlew, impacts of forestry and avoidance of additional pressures on a species of high conservation concern.</p>","PeriodicalId":15278,"journal":{"name":"Journal of Avian Biology","volume":"2025 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/jav.03286","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143252535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}