Lagomorpha

Though members of order Lagomorpha can resemble rodents (order Rodentia), they are separate and differ in that:

• they have four (not two as in rodents) incisors in the upper jaw;
• the male's scrotum is in front of the penis;
• the penis has no bone as does the rodents'; and
• they will re-digest first time feces to obtain the most from their plant diet.

Their teeth grow throughout their life, thus necessitating constant chewing to keep them from growing too long.