👉 Glyptodontidae is a family of prehistoric birds that lived during the Late Cretaceous period, around 68 to 70 million years ago. The family includes several genera and species, including: 1. Gyromys - A small flightless bird with feathers on its wings. 2. Gyrathornia - An early flightless bird that had a long neck and wingspan similar to a hummingbird. 3. Togobius - A large bird