Ключевые слова: adder, animal, behavior, camouflage, creature, dangerous, deadly, defense, defensive, ecology, fang, fear, forked, grass, green, hissing, hunter, mouth, natrix, nature, poison, poisonous, predator, reptile, reptilian, scales, scaly, scary, secretive, serpent, slither, snake, teeth, tongue, venom, venomous, wild, wildlife,