Evaluating effects of local, landscape, and regional factors on Bobolink (Dolichonyx oryzivorus) nest survival
The bobolink (Dolichonyx oryzivorus) is a migratory songbird that is currently a species at risk in Canada due to steep population declines. Because bobolink nest on the ground in pastures, hayfields, and other grassland-type habitats, nest success and abundance may be influenced by various environmental factors. Our goal is to understand whether these factors directly or indirectly affect bobolink nest success. This is important as it will contribute to filling current knowledge gaps regarding bobolink breeding success. We will analyze nest success using nest data collected throughout southern Ontario and will incorporate factors including agricultural use, the landscape surrounding grasslands, and differences across regions (i.e., temperature, weather) to understand which factors are associated with high or low nest success. Results will guide efforts to conserve this species at risk by identifying the environmental conditions favourable for nesting bobolink.