Yes, echidnas are a type of mammal called monotremes, which means a mammal that lays eggs.
Echidnas do not hibernate.
No. Echidnas do not hop. They walk.
There are no echidnas in Bali. Echidnas are found only in Australia and on the island of New Guinea.
No. All echidnas are mammals, and all mammals are vertebrates. Echidnas are different from "echinoderms".
No. Echidnas eat termites.
Yes. Echidnas are solitary animals.
Echidnas do not hibernate.
Echidnas do not hibernate.
No. Echidnas are not hostile to people or other animals.
There's no collective term for a group of echidnas.
Platypuses and echidnas are called monotremes. This is the name given to egg-laying mammals.