The newest Model in the Walker Line the DU-CK.
Or the Metal Gear Duck.
Take your choice or put in your own reference.

That must have been the Duck-equivalent of body horror/eldritch abomination. Imagine a duck that crawls on four limbs and no wings.

I'm very curious to see the reference images that Diva used to design that. The engineering on the legs is too specific not to have had some level of research behind them.