Yes, flies, specifically male flies, do have testes, which are analogous to balls in mammals.
Testes Size in Flies
The size of a fly's testes can be quite remarkable. According to research:
- When stretched out, each half of the testes measures over 0.08 inches (2 millimeters).
- This length is significant because it's "pretty much the whole length of the fly!"
This indicates that a considerable portion of a male fly's body is dedicated to its reproductive organs. Fruit flies are also known for having exceptionally long sperm. The reason behind this remains a scientific mystery.
