If you don't like zoos, they prove you have good reason.
San Antonio Zoo's management must know, as so many zoos do, that the rationales zoos provide for imprisoning animals who are wild by nature are being questioned by an ever-better informed public, and yet look what they did. Flocks of egrets and other herons (egrets are a type of heron) have started nesting in trees over one of the zoo display areas.
Actually, they had started by the time I visited the zoo a decade or so ago, and I was delighted to find a colony of yellow-crowned night-herons nesting above some of the waterfowl exhibits. Those herons are virtually unknown where I live, in Ontario, Canada, and as a zoo visitor I was pleased to see them, tame and confiding and, but for their ability to fly, often looking like other birds on display. I mean, I like to see animals and surely seeing animals is why zoos exist.
Other heron species, including the lovely little cattle egrets, have also moved in and set up nest keeping above the zoo's Tiny Tot Nature Spot and Riverbank Beach. It was deemed to be too much nature for tiny tots and their picnicking families. I mean, herons don't use flush toilets -- but they regurgitate their food, squawk, molt feathers and, put simply, don't behave like a nicely sanitized and safely isolated bird in a cage.