Effects of DDT on Bird Eggs

A set of Brown Pelican eggs from the Western Foundation of Vertebrate Zoology’s collections. Eggs in private and museum collections around the world have figured prominently in studies of eggshell thinning due to contaminants such as DDT, heavy metals, and PCBs in predatory bird species such as Brown Pelicans (Pelecanus occidentalis), Bald Eagles (Halieetus leucocephalus),…