The Gidgee Skink (Egernia stokesii). A beautiful desert skink from Australia.

Chonky reptile with a stubby and spikey tail.

Unusual for reptiles, they have live birth, and they are actually attentive parents.

When hiding from predators, they will go into a tiny space and swell themselves up with air. This, combined with that spikey tail, make them much more challenging to remove.