closeup of black caiman melanosuchus niger head camouflaged in river in the pampas del yacuma, bolivia

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