👉 Botaurus is a genus of extinct horse-like mammals from the Late Cretaceous period, about 68 million years ago. They were known for their large body size and their distinctive long necks. The most well-known member of this group was the "Great Horned" or "Giant Horse," which lived around 75 to 100 million years ago. These animals were very massive and had a thick, muscular body covered in hair.