Aviary was primarily Asian species, also contained a handful Nicobar Pigeons among others. I believe there was 2-3 Imperial Pigeons in the exhibit.
November 20th 2022
I keep thinking about a bird house recently that was completly dark and only the exhibits were lit.
I can't remember which zoo it was... I just know it was in europe and most likely in Germany. The exhibits had no barriers like glass or mesh. They birds would simply not fly into the darkness...