These zoo live cams let you hang out with pandas, giraffes, and other animals
travelandleisure.com
travelandleisure.com
I can't believe people still do this to animals in most countries...
There's a long history of humans making claims about what animals don't experience, in order to justify how we treat them, only to later discover evidence that overturns the claims. It seems to me that this has to be the default explanation for zoos as well.
At least some can emit chemicals to signal to others of their species that they are infested with harmful insects so other plants can begin producing toxins to protect themselves from infestation. Some also emit a pulse when damaged, which one might think if as kind of like a scream, though it's not anything humans can perceive with our innate senses.
(At least, not most of us. There may be exceptions. Some humans are abnormally good at sensing magnetic north, etc.)
with that said, i'd be happy if zoos (and the pens within) were 10x-100x bigger.
https://explore.org/livecams/brown-bears/brooks-falls-brown-...