>>Thanks for the input... is there a way to tell sparring behaviour from mating?
>>I was definitely not planning on leaving them together for more than a minute. Just long enough to see their reactions to each other.

Male and female - you'll see them spiralling, but mostly towards the tails.

male and male - the spiralling will usually start up around the necks and work all the way down the body.
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Mike Heinrich,
Mike@amazontreeboa.org
www.amazontreeboa.org