cape cobra swimming in a dam

african aggressive antivenin antivenom bite bitten brown bruinkapel cannibalistic cape cardiotoxin carnivore carnivorous cobra contortions crepuscular dam danger dangerous deadly death diurnal elapidae endemic fangs geelslang koperkapel lake medical mortality moving naja neurotoxin nivea paralysis poison poisonous polyvalent postsynaptic potent predator province quick reptile river scavenger serpent slang snake species squirming strike swim swimming toxic toxin twisting venom venomous water watercourse writhe writhing yellow