I feed only every 6-8 weeks for the adult animals. Neonates are fed every 1-2 weeks. Obese snakes will likely have breeding problems and will die much sooner than a snake that is fed right. Certain species like Wagler's shouldn't even be fed this much. Some snakes in this category are Bothriechis, Atheris, and Trimeresurus.
Rattlesnakes are probably the most widely known venomous snakes in North America.
These snakes are almost exclusively found in the U.S. and are one of the most highly developed group of snakes. Very easy to recognize these snakes because of the rattle. Unfortunately these snakes are also the most preyed on by the 'rattlesnake roundup' types. The Eastern Diamondback in particular seems to be in a serious state of decline. These snakes only breed every other year in the wild and cannot sustain their numbers when staggering amounts of them are removed and butchered each year.