What+is+Different?

What make the Duck-Billed Platypus different from other animals?

The Duck-Billed Platypus is a vertebrate and it is the only mammal that lays eggs. It also is unique by having a duck like nostril for a nose. The platypus is the 5th most venomous mammal in the world. The platypus has an electro-sensitive bill. Female platypuses seal themselves in their burrow to lay eggs. The babies hatch they are only the size of a lima bean.