On Thursday I went along with Imogen to Moulting Lagoon (she had to go there for work), where, amongst other critters, we spotted an echidna.
This is the back of an Short-beaked echidna. If they see you (or more likely sense you, as they have very poor eyesight), they quickly dig into the ground with their head tucked under and only their very pokey back exposed.
You’d have to be very desperate, or a dog, to try and get them out of this position.