No. Echidnas are not harmful at all. They pose no danger to human beings, as long as they are left alone. Their spines are very sharp, and if one has to handle an echidna, one should always be very careful,but as they are protected native animals, they should be left alone.
Echidnas would not have a major impact to the Environment, considering they are so small and would only mainly eat ants, not plants and bushes. After all Echidnas are Native to Australia and aren't found anywhere else on the planet.
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.
zaglossuss echidnas eat worms and insect larve.