Pictures of virgin male and female flies

A newly eclosed female. This is the “wet” stage where the fly is sticky to the touch.

The wings and body have a wet appearance.

Virgin female showing the meconium (arrow).

The meconium is a dark green area and is the remains of larval food.

Comparison between a mature (left) and virgin (right) female. This is not long after eclosure;
after a 4+ hours it becomes more difficult to tell the difference between the two.
Note the meconium on the virgin female.

Comparison between a mature (bottom) and virgin (top) male. The coloration is
similar to virgin females however the genitalia are distinctly different.
The meconium is also found in young virgin males as in females.