I used to have them,I see them for around 300 to 500.After getting them out with a snake hook you could let them wanter onto your hand just fine.Always head shy,otherwise I never had an issue.They rely much more on the night to see and in bright light they can mistake your hand for a bird or other prey.In my time with them I never had one get nippy from being mad.They are not like tree boas as far as acting defensive all the time.They just explore around like a rtb.The head shy thing is what to watch for.Find a breader,know the humidity for the type you want and the heat.Basking lamp up top with rods or branching to bask at diferent levels under the lamp.Front opening cage with good ventalation but also not so much to loose humidity.Regular misting,they will drink from their coils while coiled around the branches.I used a big square water pan at the botom.Keep in mind the bigger the tank,the harder to keep humidity up without special misters and such so dont go nuts.Feed pre killed with tongs for movement and they will strike and eat while hanging their.Very active at night,never in the day.Mine anyways.Getting the humidity,temps with adequate room for them to decide on the temp range and regular feedings you should be good.Safer to use the snake hook to get them out and then move them to you as they please.I hear some never calm down but Ive seen many that were calm and curious. Thats it for now,lol.