- Avisaurus archibaldi
- Cretaceous Age
- Hell Creek Formation
- Garfield County, Montana
- This RARE TOOTH measures approx. 3/16″ long and will come in the 3.25″ x 4.25″ Riker Mount with Label as Shown
Avisaurus was a extinct genus of avialan, known from the Hell Creek Formation. It was an enantiornithine, a group of extinct avialans that were abundant in the Late Cretaceous, distinguished for commonly having toothed jaws and clawed wings, but still remaining the typical shape of a modern flying bird. Avisaurus was probably a carnivore and a aerial predator, hunting for small birds, reptiles and mammals, like a small falcon, although it was probably more opportunistic, hunting for small invertebrates and also eating some plant material.