The males usually defend specific areas, which usually include more than one female.
Male iguanas can be highly aggressive towards one another.
Territorial displays involve rapid nodding of the head and, sometimes, biting and tail thrashing battles. Land iguanas reach maternity between 8 and 15 years of age, depending on their size. They congregate and mate during specific periods, which vary from island to island. The females then migrate to suitable areas to nest. After digging a burrow about half a meter deep, the female lays 2 to 20 eggs in the nest.