Echidnas have slender snouts and long, flicking tongues. They also has distinctive sharp spines (quills) along their back and sides for protection against predators. When threatened, the echidna will curl inwards, leaving only their sharp spines exposed.
Fact about Echidnas
The echidna is classed as a monotreme - a mammal that lays eggs. The only other animal who belongs to the monotreme order is the platypus.