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13 results for “golden-winged warbler”
Data from: Appalachian-breeding Vermivora chrysoptera (Golden-winged Warbler) occur at very low densities in mid-elevation forests and agroforestry systems throughout the Andes and isolated massifs of northern Colombia
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Data for: Evaluating Golden-winged Warbler use of alder and aspen communities managed with shearing in the western Great Lakes
<p>Best management practices are often written by researchers to guide land managers and landowners in the creation of habitat for wildlife species of interest. These documents are based on research evaluating the habitat needs of a species, but also describe tools and strategies managers can implement to create or restore desired conditions. Shrub and sapling shearing is a management practice often used to improve habitat for early-successional species, yet little monitoring or research has focused on wildlife response to shearing. The goal of this research was to formally evaluate the effect of shrub and sapling shearing as a best management strategy for Golden-winged Warbler (<em>Vermivora</em> <em>chrysoptera</em>) conservation at a regional scale. Specifically, we surveyed for male Golden-winged Warblers during the breeding season in sheared sites and untreated reference sites across portions of the western Great Lakes to assess the effects of 1) management status (i.e., sheared aspen or alder vs un-treated sites), and 2) the patch-level vegetation characteristics on male abundance. We found that male Golden-winged Warbler abundance was twice as high in sheared sites than in mature reference sites and peaked when sapling cover was ~40%. Male abundance was also negatively associated with percent cover of forbs and non-vegetated ground. These findings highlight the importance of patch-level heterogeneity when implementing shearing treatments for Golden-winged Warblers, and demonstrate the potential need for pre-treatment site assessments to help focus conservation efforts for this species. Ultimately, our results support the use of a site-specific, nuanced approach to shearing implementation to maximize cost efficiency and desired species outcomes.</p>
Data for: Evaluating Golden-winged Warbler use of alder and aspen communities managed with shearing in the western Great Lakes
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Data from: Wetter and more forested nonbreeding areas result in later departures but a faster spring migration in Vermivora chrysoptera (Golden-winged Warblers)
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Data from: Apparent annual survival of adult <em>Vermivora chrysoptera</em> (Golden-winged Warbler) does not differ by sex or region
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Implications for evolutionary trends from the pairing frequencies among golden-winged and blue-winged warblers and their hybrids
<p>Extensive range loss for the Golden-winged Warbler (<i>Vermivora chrysoptera</i>) has occurred in areas of intrusion by the Blue-winged Warbler (<i>V. cyanoptera</i>) potentially related to their close genetic relationship. We compiled data on social pairing from nine studies for 2,679 resident <i>Vermivora</i> to assess evolutionary divergence. Hybridization between pure phenotypes occurred with 1.2% of resident males for sympatric populations. Pairing success rates for Golden-winged Warblers was 83% and for Blue-winged Warblers was 77%. Pairing success for the hybrid Brewster's Warbler was significantly lower from both species at 54%, showing sexual selection against hybrids. Backcross frequencies for Golden-winged Warblers at 4.9% was significantly higher than for Blue-winged Warblers at 1.7%. More frequent backcrossing by Golden-winged Warblers, which produces hybrid phenotypes, may contribute to the replacement of Golden-winged by Blue-winged Warblers. Reproductive isolation due to behavioral isolation plus sexual selection against hybrids was 0.966. Our analyses suggest that plumage differences are the main driving force for this strong isolation with reduced hybrid fitness contributing to a lesser degree. The major impact of plumage differences to reproductive isolation is compatible with genomic analyses (Toews et al. 2016), which showed the largest genetic difference between these phenotypes occurred with plumage genes. These phenotypes have maintained morphological, behavioral, and ecological differences during two centuries of hybridization. Our estimate of reproductive isolation supports recognition of these phenotypes as two species. The decline and extirpation of the Golden-winged Warbler in almost all areas of recent sympatry suggest that continued coexistence of both species will require eco-geographic isolation.</p> <p> </p> <p> </p>
Habitat-specific survival of golden-winged warblers (Vermivora chrysoptera) during the non-breeding season in an agricultural landscape
<p>Nearctic-Neotropical migratory birds are considered priority species for conservation because they are subject to threats at distinct breeding, migratory and stopover locations throughout their annual cycle, and many species have undergone severe population declines. Research during the non-breeding season has focused on identifying the locations and habitats that migrants use, but wintering migrants are known to occupy habitats of both high and low quality, especially when the best sites are saturated by conspecifics. Thus, the presence or abundance of a species may not be a reliable indicator of winter habitat quality. The habitat associations of the golden-winged warbler <i>Vermivora chrysoptera</i>, a Nearctic-Neotropical migrant bird species of elevated conservation concern, are relatively well studied, yet conservation efforts are hindered by lack of information about basic demographic rates. In particular, no published estimates exist for non-breeding season survival, which can be a key vital rate affecting population viability, nor how survival rates vary among habitats, which is important to designing conservation programs to support populations during the winter period. We studied a color-banded population of golden-winged warblers in Costa Rica over a 3-year period and estimated overall survival rates, and the effects of habitat characteristics on survival. We found that monthly survival of juveniles (0.881) was lower than adult birds (0.978). Monthly survival during the non-breeding season (0.967) was higher than monthly survival during the rest of the annual cycle (0.930). Survival was negatively related to canopy height, and we observed a significant quadratic effect where survival peaked at intermediate levels of vine tangles and dead hanging leaves, which corresponds to habitat features associated with abundance in prior studies at this same site. Our findings contribute to our existing knowledge about the potential impacts of winter-season events on Nearctic-Neotropical migratory bird populations, and also informs potential conservation strategies for wintering golden-winged warblers.</p>
Data in support of Patterns of parental care and movement in divided broods of Golden-winged Warblers
<p>This dataset contains observations of parental care and movement for divided broods of Golden-winged Warblers tracked from fledging until indpendence at three sites in Minnesota and Manitoba. Movement data consists of minimum daily distance (i.e., the linear distance between daily locations) and daily change in azimuth (i.e., the daily change in direction traveled relative to the previous day). Parental care data includes, parental attendance, provisioning rate, unattended begging rate (i.e., fledgling begging without a parent present), and total begging rate. We also include spatial data in the form of distance between sub-broods and within sub-broods. These data can be used to replicate the findings of the publication "Patterns of Parental Care and Movement in Divided Broods of Golden-winged Warblers", published in the Journal of Avian Biology. Detailed methodology may be found in that manuscript.</p>
Golden-winged Warbler post-fledging movement and stand-scale habitat selection
<p>Our understanding of songbird habitat needs during the breeding season stems largely from studies of nest success. However, growing evidence shows that nesting habitat and post-fledging habitat often differ. Management guidelines for declining species need to be revaluated and updated to account for habitat shifts that may occur across the full breeding cycle. The Golden-winged Warbler (<i>Vermivora chrysoptera</i>) is a declining songbird species for which best management practices (BMPs) are based overwhelmingly on nesting habitat. We studied stand-scale habitat selection by fledgling Golden-winged Warblers during May-July 2014-2017 in two landscapes (2 years of data for each landscape), 200 km apart in Pennsylvania. Across four years, we radio-tagged and tracked 156 fledglings. We used discrete-choice models to evaluate habitat selection during two post-fledging time periods (days 1-5, days 6-28). Fledglings used a variety of cover types, but most telemetry relocations (i.e. 85%) occurred in forest in the stand initiation stage, stem exclusion stage, or mature forest upland. Fledglings primarily selected stand initiation forest during the first five days, but preferred habitats differed between regions during days 6-28 post-fledging.</p> <p>Fledglings in one landscape favored stands in the stem exclusion stage while fledglings in the other landscape continued to select stands in the initiation stage. Fledglings moved greater distances as they aged and dispersed approximately 750 m by day 28 post-fledging. These findings suggest the need to update Golden-winged Warbler BMPs to account for the broader habitat needs of fledglings during the breeding season. In addition, these results indicate that regional studies of habitat requirements can help guide management of dynamic forest landscapes for birds.</p>
Data in support of Patterns of parental care and movement in divided broods of Golden-winged Warblers
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Implications for evolutionary trends from the pairing frequencies among golden-winged and blue-winged warblers and their hybrids
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Golden-winged Warbler post-fledging movement and stand-scale habitat selection
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Habitat-specific survival of golden-winged warblers (Vermivora chrysoptera) during the non-breeding season in an agricultural landscape
Open the record for dataset details and reuse information.
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