I don’t know if you could call them animatronic but they moved. We have the same thing for two of the dinos on our Dinosaur Mountain in the Arizona Museum of Natural History. It was one of four dioramas Disney made for the fair, was indeed for the Ford pavilion, and after the fair closed all four were brought to Disneyland. Along with a Grand Canyon diorama, the Primeval World diorama was installed along the railroad, shortly before the Main Street station and both are still there today.
The other three were Great Moments with Mr. Lincoln (Illinois), Carousel of Progress (General Electric), and It’s a Small World (Pepsi Cola).