Epidexipteryx hui is a small, feathered theropod dinosaur from the Late Jurassic period. It features elongated tail feathers and a lightweight body adapted for climbing. Its diet likely included insects and small vertebrates. This species is notable for its unique plumage, which may have been used for display or thermoregulation.

Epidexipteryx hui is a genus of small paravian theropod dinosaur that lived during the Late Jurassic period. It is known from the Tiaojishan Formation in what is now western Liaoning, China. This region is part of the northeastern part of the modern-day Asian continent, specifically within the boundaries of the People's Republic of China.

During the Late Jurassic period, the region where Epidexipteryx hui lived was characterized by a subtropical to temperate climate. The environment consisted of dense forests, rich in coniferous and other gymnosperm vegetation, providing ample cover and resources for small theropods. The area likely featured a variety of terrestrial landscapes, including lush, forested environments with plenty of foliage.

Epidexipteryx hui is believed to have been a small arboreal theropod, adapted to a life in trees. Its ecological niche would have involved foraging for insects and possibly small vertebrates in the forest canopy. Its unique feather structure suggests adaptations for display and possibly thermoregulation, rather than flight. This indicates a niche where visual signaling played a role, potentially in mating or territorial displays.