Figure 2

Locations of fangs in mamushi, habu, and yamakagashi snakes. (a) Mamushi fangs are about 5 mm long, with very thin tips. The snakes often have two fangs on each side; (b) habu fangs are 1.5 to 2 cm long; (c) yamakagashi fangs are only about 2 mm long and are located slightly back in the mouth. Photographs courtesy of the Japan Snake Institute (a, c) and the Okinawa Prefectural Institute of Health and Environment (b).