| multi-isotopic (δ2h, δ13c, δ15n) tracing of molt origin for red-winged blackbirds associated with agro-ecosystems. | we analyzed stable-hydrogen (δ2h), carbon (δ13c) and nitrogen (δ 15n) isotope ratios in feathers to better understand the molt origin and food habits of red-winged blackbirds (agelaius phoeniceus) near sunflower production in the upper midwest and rice production in the mid-south of the united states. outer primary feathers were used from 661 after-second-year (asy) male blackbirds collected in minnesota, montana, north dakota and south dakota (spring collection), and arkansas, louisiana, missis ... | 2016 | 27846302 |