Justin,
I'm not sure what size your viv is, so it's hard to say. All of the more commonly kept Tree Boas (Sanzinia, C. caninus, and C. hortulanus) get considerably larger than B. schlegelli. In fact, I wouldn't say that there is such a thing as a small Tree Boa. Length-wise, they're all about the same (5-7 feet), but considering diameter, the Amazon is the smallest.
I have an Amazon Tree Boa and an Amazon Basin Emerald, both born last December. They are both approximately 18-20" in length, yet the Emerald is a little more than the diameter of a nickel, whereas the Amazon is no more than the diameter of a pencil.
I have no first hand experience with the Madagascar Tree Boa, but I know that they attain lengths of 5-6 feet as well, and are more comparable in girth to an Emerald.
In all reality though, I don't know that an adult Madagascar Tree Boa or Emerald Tree Boa would really require any more cage space than an adult Amazon, so it's really dependant on your preference and budget. If you're thinking about Emeralds, don't forget Chondros...I keep those too, and to be honest, I think they're a little easier to maintain than Emeralds.
Just my .02
>>Forgive my relative ignorance on snakes, but I have a question that I have been pondering. I was going to get some eyelash vipers for a big display vivarium in my new apartment, but after consulting with the stringent laws of Delaware, that will not be an option. I'm looking for a small arboreal snake (boa) that would be a relative replacement for the eyelash viper tank. I don't have a ton of money, but I do have some set aside for such a purchase. Does anyone have suggestions?
>>Best,
>>Justin
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Anthony Caponetto
http://reptiles.drivennewmedia.com