The beavers have sadly been retired from display due to their inactivity (the pair sleeps 95% of the time). A new exhibit (not revealed) will open in April.
I have seen beavers active at all hours of the day, both in the wild and in captivity. Recent trips to the Minnesota Zoo, Northwest Trek, Oregon Zoo, and Arizona-Sonora Desert Museum all afforded excellent views of active beavers.
I've been told that the new exhibit will not be part of the Mississippi River zone, it will have a different theme. That's all the park will say for now..
I've been told that the new exhibit will not be part of the Mississippi River zone, it will have a different theme. That's all the park will say for now..