CARBONDALE, Colo. — Doctors thought the strange, bleeding bumps on Aaron Dallas' head might be from gnat bites or shingles. Then the bumps started moving. A doctor found five active bot fly larvae ...

When describing a fly, many people think of the ubiquitous house fly (Musca domestica); whereas, some biologists might envision the fruit fly (Drosophila melanogaster). Both are good examples of ...