• Earthworms don’t have lungs. They breathe through their skin and can only do this when moist, so that’s why they spend most of their time underground where it is damp and cool and evaporation isn’t such a problem.
• Earthworms don’t have eyes but they can detect light through special tissues near their heads.
• Earthworms emerge from the soil at night when it is dark and they are less likely to dry out.
• Earthworms don’t have teeth – instead tiny stones swallowed by the worm help it to grind up its food very thoroughly.
• Earthworms are hermaphrodites, meaning they have both male and female organs, but they still need another worm in order to reproduce.
• Earthworms lay eggs which hatch after about three weeks.
• Earthworms have three to five hearts and need all to survive.
• Australia is home to around 300 species of native earthworm, and many introduced worm species too.
It’s onerous to find knowledgeable individuals on this subject, however you sound like you know what you’ve speaking about! Thanks