JACK HANNA'S WILD COUNTDOWN

Jack Hanna has hosted TV shows about wildlife since the premiere of "Jack Hanna's Animal Adventures' in 1993 and has become a zoological authority in his 30-plus years working at the Columbus Zoo and Aquarium in Ohio. On "Jack Hanna's Wild Countdown' he uses his knowledge and experience to present count-down lists of rare, fascinating creatures -- appropriate, given Hanna's many appearances on ``Late Show With David Letterman.' Topics include beasts equipped with armor, deceptively cute -- but dangerous -- animals, and adorable baby critters.