Coprophanaeus lancifer is the largest of all South American dung beetles. Despite its name,
this species feeds more frequently on carrion (dead animals) than on
dung. A highly unusual case in the animal kingdom, both males and
females of this species possess a long horn on their head, which they
use during intense battles with other individuals of the same sex. The
vast difference in adult body size seen here is primarily determined by
how much food was available to the developing larva. This species is
capable of rapidly burying large animal carcasses, providing an
important ecological service that sustains rain forest healing

Trond Larsen/Conservation International