Some animals are mailable under proper conditions. See the specific
instructions as noted for the following kinds of animals:
* Live bees
* Live, day-old poultry
* Live adult fowl
* Live scorpions (only under limited circumstances)
* Other small, harmless, cold–blooded animals
Popular Mechanics in 2010 sent packages through the mail with a variety of sensors. I was particularly surprised at the temperature stability they witnessed, important to shipping live animals: http://www.popularmechanics.com/technology/reviews/a6284/whi...
The mailing of scorpions is limited by the restrictions in 18 U.S.C. 1716. Under this limitation, scorpions are mailable only when sent for the purposes of medical research use or the manufacture of antivenin.
