Monotremes are very unique Mammals that lay eggs. There are currently 3 living species of Monotremes, two species of echidna the duckbill platypus.
- Monotremes are the only group of Mammals that lay eggs.
- The two species of echidna are the Short Beaked Echidna and the Long Beak Echidna.
- Echidnas are also known as Spiny Anteaters.
- The duckbill platypus has a bill similar to a ducks', and a tail similar to a beavers'.
- Male platypuses contain venom, which is unusual in the animal kingdom.