Max, the adult male Amur tiger, departed for Milwaukee today. Brookfield is going to get a "new" male tiger, Strannik, who previously resided at the Brookfield Zoo back in the mid 2000's I believe. I'm not sure when he is supposed to arrive.
Brookfield usually doesn't announce their newest arrivals right away, and sometimes not at all, but I would have thought they would announce Birdie's arrival by now.