Black flies rose in a noxious cloud and he had to beat them off as he reached the side of the prisoner.

The slow, drifting movement of the insects is almost reminiscent of snow fall except that the flies also rise in the air.

"It looked like there's a trout pool just below the bend, and the flies will be rising."

As the thick muscles of its haunches quivered, flies rose lazily into the air.

A few flies rose lazily and circled.

The flies rose in an angry cloud.

The flies rose in a buzzing, disturbed cloud just above his distended midsection.

If a startled fly should rise vertically from the vegetation, mark the spot and dig.

As Shasa approached, the flies rose in a buzzing cloud, revealing the pathetic remains on which they had been feasting.

The flies rose again as he paddled into the mud towards the wounded rhinoman.