The squibbon is a species of arboreal terasquid endemic to the Northern Forest on the northwestern coast of Pangaea II, in 200 million AD. Primarily moving by a unique form of somersaulting brachiation, its muscular limbs and boneless body make it a highly flexible and agile acrobat, allowing it to live almost exlusively in the rainforest canopy. Squibbons are highly social, living together in close-knit "communes," and practice limited tool use; as the most intelligent and social animals on the planet since the extinction of humans, they may develop recognisable culture, society, and civilisation in the far future, possibly going on to dominate the planet as humans did before them.