Gigantoraptor californicus (name meaning "California giant thief") is a species of giant omnivorous oviraptorosaurian theropod dinosaur that originally lived during the Late Cretaceous around 70 million years ago in what is now Mongolia and was once extinct, but has since been brought back by SciiFii from extinction and now lives in the Jack Giant's Birds exhibit in Cretaceous Park located at Sacramento, California.

Gigantoraptor californicus is the largest of the oviraptorids, at 8 metres (26 feet) long, and weighing more than 1,400 kg (2.2 tons), making it too big to jump. As an omnivore, it mainly feeds on fruits, leaves, carrion, and animals as bog as or smaller than a human. During the mating season, the males' feathers turn black, the face turns bright blue, and the males develop flaps of colorful blue skin flaps with dark purple circles hanging from their lower jaws to attract females, and males perform their mating dances in order to lure in females. In 2-3 months after mating seasons, the females who mated with males lay around 1-2 eggs, the eggs then hatch about 1-2 months after that, and the young are cared for until they are almost fully-grown, when they must fend for themselves.

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