Dogbane Leaf Beetle

Photograph by George Grall

This iridescent dogbane leaf beetle, found on a black-eyed susan in Frederick, Maryland, can trace its ancestors to the lower Permian, some 260 million years ago. Beetles survived the massive Permian and Triassic extinctions as well as two subsequent global extinctions, and now, with some 350,000 identified species, they are the animal kingdom's most successful members.