Many animals improve soil health through extensive digging. These "ecosystem engineers" provide a service that benefits not only soils, but plants and other organisms.
In Australia, most of our digging animals are either extinct, restricted or threatened. But not so the echidna, which is still relatively common in most habitats across large areas of the continent.
Echidnas are prolific diggers. Our long-term monitoring at Australian Wildlife Conservancy's Scotia Sanctuary, in southwest New South Wales, suggests one echidna moves about seven tonnes about eight trailer loads of soil every year.
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