penguin

The common loon is genetically closer to penguins than to ducks, sharing an evolutionary lineage dating back 40-50 million years with herons and pelicans. Despite differences in habitat and physical traits, loons and penguins have dense bones and similar coloring for diving, while ducks are more closely related to geese and swans.

Researchers from UC Davis Health discovered PFAS chemicals in penguin populations in remote Patagonia, highlighting environmental contamination in the region. The study underscores the presence of toxic substances in wildlife despite the area's isolation.