The Life of Animals | Fly | The genitalia of female flies are rotated to a varying degree from the position found in other Insects. When flies mate, the male initially flies on top of the female, facing in the same direction, but then turns round to face in the Opposite direction. This forces the male to lie on his back for his genitalia to Remain engaged with Those of the female, or the torsion of the male genitals allows the male to mate while remaining upright. Flies occur in great Populations due to Their ability to mate effectively and in a short period of time During the season.
