near rivers and lakes

The feathers provided it with thermal insulation

as many ceratopsians display complex social behaviors

due to its large size

Eohippus angustidens Variant:Primed near rivers and lakesEohippus angustidens : The horse's first step in the history of evolution Long before horses galloped across the world's open plains, their lineage took its first tentative steps in the dense forests of the early Eocene. Among them, one of the oldest and most representative was Eohippus angustidens , a tiny creature that marks the starting point of one of the most extraordinary evolutionary stories in the animal kingdom: that of the horse. Eohippus ,