Freshwater Nile crocodile lurk in murky water sticking head above surface

freshwater nile crocodile lurk water stick out head poke swim swamp surface submerge above body under black stripes dotted spotted float river marsh green semisubmerged fresh murky floating predator still amphibian greenish brackish muddy partially watchful waiting smooth movement habitat wetland crocodylus niloticus nile crocodile posture snout insidious beneath poking out afloat scary scout handheld