colchis, big-headed grass-snake (natrix megalocephala

1000 fps high speed camera colchis snake bigheaded grasssnake serpent natrix megalocephala floats forked tongue determines distance young big head white spots iucn protected caucasus slowmotion video rare largeheaded animal behavior ecology asp bionomics brute cerastes water creeper crouch diver dragon floating good swimmer grass grovel herpetology leviathan ophidian reptile reptilian ringed snakes wildlife