1.   Jumping spiders attack an adult house fly from afar, presumably to maintain the element of surprise.

2.   My house is invaded by house flies.

3.   Ordinary house flies are a health hazard and should be killed.

4.   The rooms, though kept neat by constant maternal labor, are breeding places for house flies and other bugs.

5.   These are cluster flies, so named for their clustering habits, and do not carry the diseases that house flies do.

6.   During the decisive game, a house fly got on to the table.

7.   In its adult stage, the screwworm is a fly about twice the size of the common house fly.