I've been looking into this for a couple of years and have zero solid information on it. I would start with the airline and U.S. Fish and Wildlife Service to find out what they have to say (keep a written record of names, dates, times of what is discussed).
From the US customs website:
http://www.cbp.gov/linkhandler/cgov/new ... t/pets.pdf"Visitors frequently inquire about traveling with their pets to the United States. All such importations are subject to health, quarantine, agriculture, wildlife, and customs requirements and prohibitions. Pets, except for pet birds, taken out of the United States and returned are subject to the same requirements as those entering for the first time. Returning U.S. origin pet birds are subject to different import restrictions than pet birds of non-U.S. origin entering the United States. For more information on importing pet birds into the United States, see the section on Birds, or the U.S. Department of Agriculture's (USDA) web site at
www.aphis.usda.gov/NCIE.
Pets excluded from entry into the United States must either be exported or destroyed. While awaiting disposition, pets will be detained at the owner's expense at the port of arrival. USDA does not inspect or detain pets at U.S. ports of entry.
The U.S. Public Health Service requires that pet dogs and cats brought into this country be examined at the first port of entry for evidence of diseases that can be transmitted to humans. Travelers with dogs originating from areas not free of rabies must bring a valid rabies vaccination certificate. Turtles are subject to certain restrictions, and monkeys may not be imported as pets under any circumstances.
The U.S. Fish and Wildlife Service (FWS) is concerned with the importation, trade, sale, and taking of wildlife and with protecting endangered plant and animal species. Some wild species of dogs, cats, turtles, reptiles, and birds, although imported as pets, may be listed as endangered. Endangered and threatened animals and plants, migratory birds, marine mammals, and certain dangerous wildlife may not be imported without special federal permits. Sportsmen will find the section on wildlife of particular interest, since game birds and animals are subject to special entry requirements.
Also, check with state, county, and municipal authorities for local restrictions on importing pets. It is a general requirement that airlines require health certificates for traveling pets. You should check with your airline prior to your travel date to find out what the requirements are."