Animal scrape in a bunker

[Colin L]

Good question! Technically speaking any living creature that is not a plant is an animal. So, insects, fish, crabs, rabbits deer and just about any other critters you can think of are animals. Perhaps the definition should be charged to Burrowing mammals, marsupials (for Australia and South America), reptiles or birds?

My reply to Slab was no more serious than his question.

You weren't any more serious in suggesting a change to the Definition? Were you?

Well, just in case you were, there is no need to change the Definition. An abnormal ground condition is made by any of 3 categories of animal: ones that burrow and birds and reptiles. It's clear enough as it is.