closeup head on portrait of black caiman melanosuchus niger entering water from riverbank with focus on eye in the pampas del ya

alligator amazon amazonas america animal animals black bolivia caiman camouflage carnivore closeup croc crocodile danger dangerous del destinations entering eye focus forest gator head jaws melanosuchus mouth nature niger pampas portrait predator reptile river riverbank rurrenabaque scales scary skin south teeth travel water wild wildlife yacuma