Life Cycle
Like other spiders, tarantulas have to shed their exoskeleton periodically in order to grow, a process called moulting. A young tarantula may do this several times a year as a part of the maturation process, while full grown specimens will only moult once a year or less, or sooner in order to replace lost limbs or lost urticating hairs. It is clear that moulting will soon occur when the exoskeleton takes on a darker shade. If a tarantula previously used its urticating hairs, the bald patch will turn from a peach color to deep blue.
Tarantulas may live for years; most species take two to five years to reach adulthood, but some species may take up to ten years to reach full maturity. Upon reaching adulthood, males typically have but a 1 to 1.5 year period left to live and will immediately go in search of a female with which to mate. Male tarantulas rarely moult again once they reach adulthood. The oldest spider, according to Guinness World Records, lived to be 49 years old.
Females will continue to moult after reaching maturity. Female specimens have been known to reach 30 to 40 years of age, and have survived on water alone for up to 2 years. Grammostola rosea spiders are renowned for going for long periods without eating.
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