Blood-equivalent total mercury concentrations in birds

Map of North America shows dots where birds have been found, with varying levels of mercury in their blood.

Detailed Description

Blood-equivalent total mercury (THg) concentrations in birds across western North America using original data (n=27,629 individual samples). All individual data points are shown, with lower THg concentrations in the background as larger symbols and higher THg concentrations as smaller symbols on top.

Details

Image Dimensions: 1456 x 1125

Location Taken: US