If you want an animal that doesn't move I suggest go straight to the gorilla compound. It certainly has changed since the days of Willie B.
A big open field with a huge concrete rope covered tree to climb on. Of course the mature gorillas just sat rarely moving at all.
The youngsters were a different story. The baby in the mothers lap is also the acrobat in the next picture. The male Silverback on the right never moved.
The baby acrobatically crossed the tree and hung suspended from the rope. He would stop and hold his position so he was great to draw.
The double spread of the gorillas.
Thanks for looking.