Fig. 2.

Collection localities and methylmercury concentrations measured in the breast feathers of black-footed albatross museum specimens from the Harvard University Museum of Comparative Zoology (n = 8) and University of Washington Burke Museum of Natural History and Culture (n = 17). Lowest (5,000 ng·g⁻¹) and highest (40,000 ng·g⁻¹) adverse effect thresholds for birds are indicated on the color ramp. Albatross photo by S.V.E.