Avisaurus was a unknown. It lived in the Late Cretaceous period and inhabited North America. Its fossils have been found in places such as Montana (United States) and North Dakota (United States).

All the Avisaurus illustrations below were collected from the internet. Enjoy and explore:

Avisaurus was described by the following scientific paper(s):
  • R. E. Sloan and L. Van Valen. 1965. Cretaceous mammals from Montana. Science 148(3667):220-227
  • J. P. Hunter and D. A. Pearson. 1996. First record of Lancian (Late Cretaceous) mammals from the Hell Creek Formation of southwestern North Dakota, USA. Cretaceous Research 17