Element concentrations in nestling tree swallows (Tachycineta bicolor) from the U.S. and Binational Great Lakes’ Areas of Concern: Data
Tree swallow, Tachycineta bicolor, nestlings were collected from 76 sites in the Great Lakes which included multiple sites at 27 Areas of Concern (AOCs) and 12 sites not listed as AOCs from 2010 to 2015.  Livers were harvested and analyzed for 21 elements.  Mercury concentrations differed among AOCs; however, all …