Yes.
Though its body shape and spines would seem to inhibit its swimming ability, the echidna actually swims quite well, and even uses swimming as a means to regulate its own temperature.
Yes. Not only can echidnas float, they can also swim, as long as the current is not too strong.
swim well
Echidnas are one of Australia's native animals which have been least affected by human habitation. As echidnas feed on termites and ants, there is always a ready supply of these insects. However, this does not mean there is no effect on the echidna's habitat. Anywhere there is urban development is a threat to echidnas, whether this impact is by cars hitting the animals; echidnas being killed by domestic dogs; or building development such as bulldozers and other digging equipment. One of the major effects on echidnas is caused by flooding, often a result of humans changing natural watercourses by their activities. Echidnas can swim, but they cannot survive floodwaters.
Echidnas are mostly nocturnal, though in the southern areas of Australia they can be seen during the day as well. They are nocturnal in northern areas to avoid the heat.
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.
Echidnas in northern Australia are nocturnal. On occasion, they are seen during the day when the weather is mild. Echidnas in southern Australia tend to be more active during the day, especially during winter.
No. All echidnas are mammals, and all mammals are vertebrates. Echidnas are different from "echinoderms".
Crocs swim well.
No. Echidnas eat termites.
They swim very well - better than people!