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Description
Dinosaurs that are resting and sleeping aren't often shown in paleoart, but it's important to show that dinosaurs aren't always running around killing each other. Based on fossils such as Mei long, we know that at least some dinosaurs curled up when asleep, much like birds do. They may have also "roosted" like birds, as the dromaeosaur on the left is doing. It's unlikely that dinosaurs just slept in whatever position they happened to be in like reptiles do; they probably were much more bird- or mammal-like in their sleeping habits.

Description
Dinosaurs that are resting and sleeping aren't often shown in paleoart, but it's important to show that dinosaurs aren't always running around killing each other. Based on fossils such as Mei long, we know that at least some dinosaurs curled up when asleep, much like birds do. They may have also "roosted" like birds, as the dromaeosaur on the left is doing. It's unlikely that dinosaurs just slept in whatever position they happened to be in like reptiles do; they probably were much more bird- or mammal-like in their sleeping habits.