"This alpha male lion has territory and females to spare. But when two bachelor males invade his turf, this lion king will have to fight them both to keep his crown."
Male lions mature at the age of 2-3 years and are fully grown by their 4th birthday. They then have 6-7 years of full of life, and are considered old after the age of 10 years.
An average pride consists of about 15 individuals; 2-3 grown males, 3-6 females and their offspring. The females are in most cases sisters. The males in a pride are close relatives - usually blood brothers or close cousins that have grown up together. The leader among them is an alpha male; the others are subordinates whose job is to provide backup in protecting females and the young from adversaries - which includes other lions.
The African Lion http://goo.gl/rfvwp