Protornis is an extinct genus of prehistoric coraciiform bird. It contains one species, P. glarniensis from the Early Oligocene-aged Matt Formation of Canton Glarus, Switzerland. It is known from a partially complete but poorly-preserved fossil skeleton known from the famous "Glarus Fish Slates". Its name derives from the fact that at the time of discovery, it was considered one of the oldest fossil birds, as the rocks in which it was found were thought to date to the Cretaceous, although they are now known to date to only the Early Oligocene.