Female screwworm flies mate only once during their life cycle, which creates a pathway ... livestock and wild animals are when a female fly lays her eggs on an animal's open wounds or other ...

The New World screwworm fly was eradicated in the US in the mid-1960s, but a new sighting in southern Mexico has authorities in Texas on alert for a little insect that can do a lot of damage.

The New World screwworm, so named because it can burrow into an open wound like a screw driving into wood, is the larvae of an invasive fly, which deposits its larvae into an open wound.