What is often considered the baseline requirement for the physical enclosure of an Emperor Tamarin to allow for ethical keeping?

Answer

An aviary large enough to allow natural movement

Because they are arboreal and highly active, ethical keeping often necessitates converting an entire room into a secure, climate-controlled habitat or aviary that supports complex, three-dimensional movement.

What is often considered the baseline requirement for the physical enclosure of an Emperor Tamarin to allow for ethical keeping?
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