The enclosure is a mixture of sandy and dusty plains, prairie, and forest.
The terror bird paddock is composed also of sandy grassland due to the birds need to dust bathe. The fences were tall but did not go deep enough into the ground, so the bird undermined it when digging dust-bathing holes.
It was broken during the mass escape and supposedly rebuilt with fence posts buried four feet deep.
- Phorusrhacos paddock image gallery.