According to National Geographic, peacocks have an average lifespan of 20 years. The average body size of a peacock is 25 to 50 inches, but its tail can be upwards of 5 feet long. This means that more than 60 percent of a peacock's total body size is made up of his tail. Peacocks weigh between 8.75 and 13 pounds.
National Geographic says that when taking into account the size of a peackock's body and tail, this is one of the largest flying birds in the world. Although the tail of a peacock makes up a large portion of his body, the tail's main purpose is for mating rituals. Scientists believe that females choose their mates based on the color, quality and size of the males' feather trains.
Although the term peacock is commonly used when referring to both females and males in this bird species, only the males are peacocks, according to National Geographic. Females are called peahens. When peahens and peacocks are together, they are known as peafowl. Unlike other species in the animal kingdom, peacocks often gather harems of peahens and mate with all of them. Each peahen lays between three to five eggs. It's not uncommon to see wild peafowl gathering together in forest trees. These groups are referred to as parties.