Mercury’s Silent Toll On the World’s Wildlife

Harmful levels of mercury have turned up in all sorts of animals, from fish and birds living around the world to pythons invading the Florida Everglades and polar bears roaming far from any sources of pollution. In recent years, biologists have been tracking mercury’s footprints in unexpected habitats and species. Their research is illuminating the subtle effects of chronic exposure and is showing that ever-lower levels cause harm.
http://e360.yale.edu/feature/mercurys_silent_toll_on_the_worlds_wildlife/2617/