Iron and steel rusting is an example of corrosion. Copper pitting or the green patina one sees on copper roofs are also examples of corrosion. Stress Cracking is also considered an example of corrosion.
Some omnivores are: Humans Bears Chickens Pigs Raccoons Badgers Hedgehogs Opossums Skunks Sloths Squirrels Chipmunks Mice Rats Chimpanzees Various birds Chickens Some fish Some lizards and turtles...