Lurking in dark crevices in cave walls and ceilings, hunting boas lie in wait for warm-blooded prey. They attack in twos and threes, coordinating their efforts. Their bite is merely a means to secure a hold - once achieved, the boas quickly wrap around their victim and relentlessly tighten their grip. Suffocation ensues. Instinct: To constrict and devour

• Hide curled up in cave walls and ceilings
• Ambush them
• Wrap around and suffocate them