nile crocodiles,crocodylus niloticus, on the banks of the kwando river, caprivi, namibia

kwando river caprivi namibia park natural wilderness tropical power hunting aggressive alligator head big crocodylus niloticus environment swamps marshlands skin reptilia giant safari day hunter africa crocodile wildlife habitat reptile freshwater water carnivore animal creature dangerous close tooth nature predator mouth powerful african aquatic lake nile prey danger smile horizontal