Echidnas are 30cm to 40cm in length and weigh between 2 kg and 5 kg. Echidnas are monotremes (mammals that lay eggs). There are only three species of monotreme in the world -- the platypus and two species of echidna, one of which is restricted to the New Guinea highlands. They have many features which are reptilian in nature such as egg laying, legs that extend outward then downward, and a lower body temperature (about 31-32 degrees C), than other mammals.
structural adaptations
the echidna has sharp claws which are used for digging into the ground to be able to catch prey, and a long tongue which has sticky saliva so it can catch termites and ants easier. They also have spikes on its back to to protect themselves from predators
physiological adaptations
they have fur between their spikes to keep themselves warm and to cool themselves down
behavioural adaptations
several males would walk with one female in the chance that they could mate with her, even though they aren't well known for it they are decent swimmers with only their spikes and their snout showing.
structural adaptations
the echidna has sharp claws which are used for digging into the ground to be able to catch prey, and a long tongue which has sticky saliva so it can catch termites and ants easier. They also have spikes on its back to to protect themselves from predators
physiological adaptations
they have fur between their spikes to keep themselves warm and to cool themselves down
behavioural adaptations
several males would walk with one female in the chance that they could mate with her, even though they aren't well known for it they are decent swimmers with only their spikes and their snout showing.