USGS - Science for a Changing World

Open-File Report 2005-1281

Water Level Management and Contaminant Exposure in Tree Swallows Nesting on the Upper Mississippi River

By Thomas Custer and Christine Custer


A study was initiated in 2000 to determine if tree swallow exposure to mercury and other contaminants increased after the 2001 Pool 8 water level drawdown. If true, then we would predict the mercury concentrations in tree swallows would be higher in 2002 than 2000 or 2001.



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Download the report (PDF, 1.6 MB)

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For additional information contact:

U.S. Geological Survey
Upper Midwest Environmental Sciences Center
2630 Fanta Reed Road
La Crosse, Wisconsin 54603

Please visit for more information about USGS activities in La Crosse, Wisconsin.

U.S. Department of the Interior, U.S. Geological Survey
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Last modified: Saturday, January 12 2013, 09:29:02 PM
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