The marshy conditions of the dinosaur freeway (the reason its footprints formed, and have survived) may, though, have favoured crocodilians over predators that had evolved on drier land.
Manatees, also known as sea cows, are large, slow moving animals that live in the rivers and marshy coastal areas of West Africa, the Amazon, the Caribbean Sea, and the Gulf of Mexico.
As soon as he got out of the gorge and onto the marshy land behind it, he broke into a stumbling run, every now and then falling flat on his face in the snow.