1. Egg-laying mammal: The platypus is one of the only two living mammals that lay eggs. The other one being the echidna.
2. Duck-like bill: The platypus has a broad, flat bill that resembles that of a duck. It uses its bill to forage for food in the water.
3. Venomous spurs: Male platypuses have a pair of venomous spurs on their hind feet. These spurs are used for defense and can deliver a painful sting.
4. Electrolocation: The platypus has the ability to sense electrical signals in the water. This helps it to find prey, such as crustaceans and small fish.
5. Lack of stomach: Platypuses lack a conventional stomach. Instead, they have a simple, muscular pouch called a proventriculus, where food is stored and broken down.
6. Unique fur: Platypuses have dense, water-resistant fur that keeps them warm in the water. Their fur also traps air, which helps them float.
7. Seasonal sex change: Female platypuses go through a seasonal sex change. During breeding season, they develop male characteristics, such as the growth of spurs.
8. Milk production: Female platypuses produce milk to feed their young. However, they do not have nipples. Instead, they secrete milk through pores in their skin.
The platypus is a fascinating and unique creature that combines features from several different animal groups. It is a living example of the remarkable diversity of life on Earth.