Upper Midwest Environmental Sciences Center
USGS scientist Tom Custer examines barn swallows near Lake Charles, Lousiana, exposure of barn swallow nestlings to trace elements, petroleum, and PCBs: Full resolution
Photo by Christine Custer, USGS, UMESC, 2003
Usage: This image is public domain/of free use. Please refer to the USGS Copyright section for more details.
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://www.umesc.usgs.gov/images/photos/outdoor_lab.html
Page Contact Information: Contacting the Upper Midwest Environmental Sciences Center
Page Last Modified:
March 7, 2011
