@Jonathan The last Pronghorn is living out his life at the Wilds, both bison have passed away and the beavers were sent to another zoo. There are not plans for the bison or pronghorn to return but I do not know about beavers.
@Jonathan As of last year, the zoo had said that they do not plan on obtaining new bison. The plan could change, but as of right not there are not plans.
