This has been discussed extensively in the shipping forum.......
To put it as simply, and briefly, as possible: the only overnight carrier that knowingly and admittingly accepts snakes is FedEx, and that is with their waiver and for "business to business". There is Delta, and Northwest. I haven't used Northwest, personally, but I have spoken to a rep...it sounds like they offer the same service as Delta, but without the necessity of becoming a "recognized shipper". A Delta account is great...but if you don't use it enough, they cancel it
. I'm probably going to meet that fate, unless I get around to advertising/selling something this year, lol...at that point I may give Northwest a try.