The black fly life cycle can be rapid, taking about three weeks from egg laying to maturation of the adult. Only the female bites, the blood meal being used to provide protein for egg maturation.

An outbreak of biting black flies is spreading in pockets across the Inland ... Because flowing water is a key part of the black fly life cycle, this year’s heavy precipitation may be at ...

This year's cold, wet spring could have provided a boost for the life cycle of black flies, according to Celia Evans, an ecologist at Paul Smith's College in upstate New York.

The female black fly has to suck blood from an animal and human prey to complete the reproduction cycle. Typically, black flies bite domestic animals and mammals, including humans.

Combine the high reproductive rate with a short life cycle, and the population can explode quickly. The Snake River at high flow can produce up to 1 billion black flies per mile per day and many ...

HARRISBURG — The Pennsylvania Department of Environmental Protection (DEP) has started its annual black fly suppression program, monitoring and treating 48 rivers and streams spanning more than ...