OCR Text |
Show Reason for Snake's Hissir.g. j The hissing of a snake is caused by the long, sac-like lung being inflated I with nlr, which Is forcibly expelled j ,! through the glottis and nostrils. The :; puff adder makes the loudest and most I prolonged hiss of any snake. When j t alarmed, snakes hiss with the object j j sf frightening off their enemies. If j j snakes were not able to make their j presence known they would be fro- ' . quonily trodden upon and injured by " Hie various creatures of veldt, forest ' and mountain. |