They look like anteaters
There are 4 species of echidnas
They curl into a ball
They have low Metabolism
The neocortex makes up half of the echidna's brain
They are divided into 2 groups: Zaglossus, Tachyglossus
Zaglossus
Tachyglossus
Neocortex - The part of the brain concerned with sight and hearing in mammals