Echnidas have a long, tube-like mouth with a sticky tongue, and they are also covered in spines. They have mammary glands, and lay eggs.
The echidna has a way of protecting itself. With its long, sharp claws, they quickly dig a hole until only their spines are showing. The predator will not be able to get to it without injuring itself. When there is a fire, the Echidna will dig down out of reach of the fire.