The largest reticulated python on record (dubbed "Colossus") lived at the Pittsburgh Zoo in the 1950s, and was measured at 28.5 feet long. Unconfirmed wild animals reportedly reach 30 feet or more. Although reticulated pythons are the longest snakes, they are not the most heavily built. That honor goes to the anaconda. Their color and pattern can vary along their range, most commonly being a brownish color and having a diamond-shaped pattern along their back.