TY - RPRT TI - Tree species preferences of foraging songbirds during spring migration in floodplain forests of the Upper Mississippi River AU - Eileen M. Kirsch AU - Michael J. Wellik PY - 2017 DO - 10.1674/0003-0031-177.2.226 UR - https://pubs.usgs.gov/publication/70189637 ID - 70189637 ER -