👉 The term "ornithischian" refers to a group of extinct birds and reptiles that lived during the Late Cretaceous period, approximately 68 to 65 million years ago. These creatures are known for their feathered morphology and were characterized by a distinctive beak-like structure on their bill called an "ornithid." They evolved from birds with feathers, but without wings, as they died out around 10 million years ago. The term was coined by the pale