Housing Together

My local zoo had a emerald tree boa and a Brazilian rainbow boa housed together. They didn't bother each other but was this acceptable?

Most of the time in zoos they have large amounts of space to work with so that the two can get away from each other and still have plenty of room.

Since I don't know a huge amount about either species, I don't know if they would have all the individual needs met in one enclosure.

The emerald tree boa was on a limb and the rainbow boa was on the ground.

Tree boas as you would guess live in trees while rainbow boas live on the ground so they wouldn't bother each other and they are both from the same part of the world so there requirements are similar. So if you hard a large enough enclsoure you could probably pull it off although I wouldn't recommend it for the amature.

I have had discussions with the keepers of our local zoo about these situations.
What many don't think about is, zoo's have certain capabilities above and beyond the extent of most hobby keepers!
Besides the larger, very carefully thought out, enclosure size and construction, the inhabitants would have been isolated and quarantined for a considerable length of time and give thorough health checks before being introduced to other animals.
Its not a case of grabbing a couple at a pet shop and tossing them together after a couple of weeks.