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97 results for “Bird Range”
Survey of winter bird communities and vegetation in the Oregon Coast Range
<p>We re-surveyed forest bird communities during winter in seven large plots originally surveyed by graduate student, Stanley Anderson, from 1968 through 1970, near Corvallis, Oregon, USA. The forests in plots in the Coast Range Mountain foothills were and are currently dominated by Douglas-fir (Pseudotsuga menziesii). Anderson's thesis included plot locations, summaries of vegetation characteristics and point estimates of bird densities for each plot. Because of the lack of similar data, we re-surveyed his plots after aligning methods with his and added modern components (distance and time interval sampling) to facilitate comparisons of changes in abundances. We preserved more extensive metadata than were preserved from Anderson's surveys, including georeferenced point count survey locations to facilitate more precisely repeatable future re-surveys. We also measured vegetation characteristics to compare structural changes since Anderson's measurements.</p>
Elevational range of mammals, birds, and amphibians in the Himalayas
<p><span>The lowest and highest elevations known for each species are used to delineate its elevational limits. We assume that species potentially exist between their elevational limits. For species that have a single elevational distribution record (resulting in an elevational range of zero) as well as those with elevational ranges less than 200 m, we adjusted their elevation ranges to 200 m. We verified all data for accuracy by experts within the region and any dubious outlying records were removed. Elevational limits were given for 1,488 species, including 314 mammals, 1027 birds, and 147 amphibians in the Himalayas.</span></p>
Data and code from: Birds optimize fruit size consumed near their geographic range limits
<p>This dataset is <a href="https://doi.org/10.5061/dryad.931zcrjs5">available from Dryad</a>. </p>
Movement of juvenile migratory birds from settlement to adulthood across the non-breeding range
<p>Among migratory vertebrates, high levels of fidelity to non-breeding sites during adulthood are common. If occupied sites vary in quality, strong site-fidelity can have profound consequences for individual fitness and population demography. Given the prevalance of adult site-fidelity, the regions of the non-breeding range to which juveniles first migrate, and the scale of any subsequent movements, are likely to be pivotal in shaping distributions and demographic processes across population ranges. However, inherent difficulties in tracking migratory individuals through early life mean that opportunities to quantify juvenile settlement and movements across non-breeding ranges, and the mechanisms involved, are extremely rare.Through long-term, range-wide resightings of hundreds of colour-marked individuals from their first migration to adulthood, and application of state-space models, we quantify levels of juvenile and adult regional-scale movements and distances at different life stages across the whole non-breeding distribution range in a migratory shorebird, the Black-tailed Godwit (<em>Limosa limosa islandica</em>). We show that the probability of individuals changing non-breeding regions (seven historical wintering regions spanning the Western Europe range) at all ages are very low (mean movement probability = 10.9% from first to subsequent winter, and 8.3% from first adult winter to later winters). Movement between regions was also low between autumn and winter of the same year for both juveniles (mean movement probability = 17.0%) and adults (10.4%). The great majority of non-breeding movements from the first autumn to adulthood were within regions and less than 100 km. The scarcity of regional-scale non-breeding movements from the first autumn to adulthood means that the factors influencing where juveniles settle will be key determinants of non-breeding distributions and of the rate and direction of changes in distributions.</p>
Fig. 7 in Ethological Aspects Of Biodiversity Within And Between Phylloscopus Species: Behavioral Variation Among Birds From The Centre And Periphery Of Breeding Ranges
Fig. 7. The example of a Greenish Warbler male's territory.
Fig. 4 in Ethological Aspects Of Biodiversity Within And Between Phylloscopus Species: Behavioral Variation Among Birds From The Centre And Periphery Of Breeding Ranges
Fig. 4. Terms of arrival of Leaf Warblers to the breeding areas in 1973 – 2014.
Fig. 3 in Ethological Aspects Of Biodiversity Within And Between Phylloscopus Species: Behavioral Variation Among Birds From The Centre And Periphery Of Breeding Ranges
Fig. 3. The example of a 'line-territory' of a Chiffchaff male.
Decoupling pioneering traits from latitudinal patterns in a North American bird experiencing a southward range shift
<ol> <li>Eco-geographic rules describe spatial patterns in biological trait variation and shed light on the drivers of such variation. In animals, a consensus is emerging that 'pioneering' traits may facilitate range shifts via a set of bold, aggressive, and stress-resilient traits. Many of these same traits are associated with more northern latitudes, and most range shifts in the northern hemisphere indicate northward movement. As a consequence, it is unclear whether pioneering traits are simply corollaries of existing latitudinal variation, or whether they override other well-trodden latitudinal patterning as a unique eco-geographic rule of phenotypic variation.</li> <li>The tree swallow (<em>Tachycineta</em> <em>bicolor</em>) is a songbird undergoing a <em>southward</em> range shift in the eastern United States, in direct opposition of the poleward movement seen in most other native species' range shifts. Because this organic range shift countervails the typical direction of movement, this case study provides for unique ecological insights on organisms and their ability to thrive in our changing world.</li> <li>We sampled female birds across seven populations, quantifying behavioral, physiological, and morphological traits. We also used GIS and field data to quantify a core set of ecological factors with strong ties to these traits as well as female performance.</li> <li>Females at more southern expansion sites displayed higher maternal aggression, higher baseline corticosterone, and more pronounced elevation of corticosterone following a standardized stressor, contrary to otherwise largely conserved latitudinal patterning in these traits. Microhabitat variation explained some quantitative phenotypic variation, but the expansion and historic ranges did not differ in openness, distance to water, or breeding density.</li> <li>This countervailing range shift therefore suggests that pioneering traits are not simply corollaries of existing latitudinal variation, but rather, they may override other well-trodden latitudinal patterning as a unique eco-geographic rule of phenotypic variation.</li> </ol>
Data for: Recent range shifts of moths, butterflies, and birds are driven by the breadth of their climatic niche
<p><span>Species are altering their ranges as a response to climate change, but the magnitude and direction of observed range shifts vary considerably among species. The ability to persist in current areas and colonize new areas plays a crucial role in determining which species will thrive and which decline as climate change progresses. Several studies have sought to identify characteristics, such as morphological and life-history traits, that could explain differences in the capability of species to shift their ranges together with a changing climate. These characteristics have explained variation in range shifts only sporadically, thus offering an uncertain tool for discerning responses among species. As long-term selection to past climates have shaped species' tolerances, metrics describing species' contemporary climatic niches may provide an alternative means for understanding responses to on-going climate change. Species that occur in a broader range of climatic conditions may hold greater tolerance to climatic variability and could therefore more readily maintain their historical ranges, while species with more narrow tolerances may only persist if they are able to shift in space to track their climatic niche. Here, we provide a first-filter test of the effect of climatic niche dimensions on shifts in the leading range edges in three relatively well-dispersing species groups. Based on the realized changes in the northern range edges of 383 moth, butterfly, and bird species across a boreal 1100 km latitudinal gradient over c. 20 years, we show that while most morphological or life-history traits were not strongly connected with range shifts, moths and birds occupying a narrower thermal niche and butterflies occupying a broader moisture niche across their European distribution show stronger shifts towards the north. Our results indicate that the climatic niche may be important for predicting responses under climate change and as such warrants further investigation of potential mechanistic underpinnings. </span></p>
Winter range shifts and their associations with species traits are heterogeneous in eastern North American birds
<p>Many species' distributions are shifting in response to climate change. Many distributional shifts are predictably poleward or higher in elevation, but heterogeneity in the rate and direction of shifts both within and between species appears to be common. We found high heterogeneity in the trajectory of winter range shifts for 65 species of birds across eastern North America and in the different traits and trait interactions associated with these shifts across the spatial scales we examined. We used data from the Christmas Bird Count to quantify the trajectory of winter latitudinal center of abundance range shifts over four decades (1980–2019) for 65 species of songbirds and woodpeckers in North America, both across eastern North America (ENA) as a whole and for the Atlantic (ATL) and Mississippi (MISS) flyways separately. We then used linear models and AICc model selection to test whether species traits could explain variation in range shifts or flyway discrepancies. Across ENA, most species showed northward latitudinal range shifts, but some showed no latitudinal shift while others shifted southwards. Amongst ATL and MISS, we documented both within- and between-species differences in the rate and direction of latitudinal shifts, complicating the results from across ENA. No single trait emerged as a dominant driver of range shift differences at the ENA and flyway scales. Migration strategy interacted with insectivory to explain variation at the largest spatial scale (ENA), whereas frugivory and mean winter latitude explained much of the variation in ATL and MISS, respectively. Exploring heterogeneity in range shifts within and between species, and in the associations between range shifts and life history traits, will help us better understand the mechanisms that mediate differing responses to environmental change and predict which species will be better able to adapt to those changes. </p>
Data from: Regional variation in climate change alters the range-wide distribution of colour polymorphism in a wild bird
<p><span>According to Gloger's rule animal colouration is expected to be darker in wetter and warmer climates. Such environmental clines are predicted to occur in colour polymorphic species and to be shaped by selection if colour morphs represent adaptations to different environments. We studied if the distribution of the colour polymorphic tawny owl (<em>Strix aluco</em>) morphs (a pheomelanic brown and a pale grey) across Europe follow the predictions of Gloger's rule and if there is a temporal change in the geographical patterns corresponding to regional variations in climate change. We used data on tawny owl museum skin specimen collections. First, we investigated long-term spatiotemporal variation in the probability of observing the colour morphs in different climate zones. Second, we studied if the probability of observing the colour morphs was associated with general climatic conditions. Third, we studied if weather fluctuations prior the finding year of an owl explains colour morph in each climate zone. The brown tawny owl morph was historically more common than the grey morph in every studied climate zone. Over time the brown morph has become rarer in the temperate and Mediterranean zone, whereas it has first become rarer but then again more common in the boreal zone. Based on general climatic conditions winter and summer temperature were positively and negatively associated with proportion of brown morph, respectively. Winter precipitation was negatively associated with proportion of brown morph. The effects of five-year means of weather on the probability to observe a brown morph differed between climate zones, indicating region dependent effect of climate change and weather on tawny owl colouration. To conclude, tawny owl colouration does not explicitly follow Gloger's rule, implying a time and space dependent complex system shaped by many factors. We provide novel insights in how the geographic distribution of pheomelanin-based colour polymorphism is changing.</span></p>
Decoupling pioneering traits from latitudinal patterns in a North American bird experiencing a southward range shift
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Data from: A wide range of abiotic and biotic variables leaves most variation in bird nest architecture unexplained
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Elevational range of mammals, birds, and amphibians in the Himalayas
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Winter range shifts and their associations with species traits are heterogeneous in eastern North American birds
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Data from: Does metabolism constrain bird and mammal ranges and predict shifts in response to climate change?
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Data and code from: Birds optimize fruit size consumed near their geographic range limits
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Data from: Poleward range shifts of breeding birds in Wisconsin
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Data from: Regional variation in climate change alters the range-wide distribution of colour polymorphism in a wild bird
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Movement of juvenile migratory birds from settlement to adulthood across the non-breeding range
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.