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Grassland birds in North America have declined sharply over the last 60 years, driven by the widespread loss and degradation of grassland habitats. Climate change is occurring more rapidly in grasslands relative to some other ecosystems, and exposure to extreme and novel climate conditions may affect grassland bird ecology and demographics. To determine the potential effects of weather and climate variability on grassland birds, we conducted a systematic review of relationships between temperature and precipitation and demographic responses in grassland bird species of North America. Based on 124 independent studies, we used a vote-counting approach to quantify the frequency and direction of significant effects...
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The North American Breeding Bird Survey (BBS) (https://www.pwrc.usgs.gov/bbs/) has counted birds annually for over fifty-five years. Survey 'routes' each consist of 50 'stops' (point counts) placed along a route path. Inter-stop distances and stop locations can vary from route to route and from year to year, and precise locations of each stop are not typically recorded. This data set (and the associated R script) includes quantified uncertainty in BBS annual point count locations using digitized estimates of stop locations from the central United States. It also includes the necessary components to calculate the resulting land cover uncertainty for each annual point count (i.e., stop) and facilitates incorporation...
    map background search result map search result map Location and land cover uncertainty associated with stop-level data from the North American Breeding Bird Survey (BBS) Location and land cover uncertainty associated with stop-level data from the North American Breeding Bird Survey (BBS)