Sinraptor species, including S. henanensis and S. mongoliensis, were medium-sized theropod dinosaurs from the Late Jurassic period, known for their sharp teeth and agile build. They roamed the floodplains of what is now China and Mongolia, likely hunting small to medium-sized prey with their keen senses and swift movements.

S. henanensis and S. mongoliensis are two species belonging to the extinct genus Sinosauropteryx, which were discovered in the Yixian Formation of China. The Yixian Formation is located in the Liaoning Province, in the northeastern part of China. This region is known for its rich deposits of Early Cretaceous fossils, dating back approximately 125 million years ago.

During the Early Cretaceous period, the Yixian Formation had a temperate to subtropical climate, characterized by distinct wet and dry seasons. The environment was a mix of forested areas and open landscapes with volcanic activity influencing the terrain. The presence of lakes and rivers created a diverse ecosystem.

Sinosauropteryx species were small theropod dinosaurs that likely occupied a niche as opportunistic carnivores or insectivores. They were adapted to a ground-dwelling lifestyle, with evidence suggesting they hunted small vertebrates and insects. Their feather-like structures suggest they may have had some thermoregulatory advantages or used these features for display.