3d video no humans stomach bulge teeth furry outdoors tagme nature duo mammal bodily fluids biting claws throat bulge size difference canid canis canine wolf feral no sound grey body scalie outside green scales reptile vore grass dinosaur nature background theropod stomping ambiguous gender predator/prey bite bush larger feral feral on feral river feral only smaller feral larger pred smaller prey tall grass prehistoric species monolophosaurus