. >>> david letterman is next with jack hanna. >> ought to be some interesting animals for sure. see you tomorrow morning, 4:30. ( band playing "late show" theme ) >> from the heart of broadway, broadcasting across the nation and around the world, it's the "late show" with david letterman. tonight... plus paul shaffer and the cbs orchestra. i'm alan kalter. captioning sponsored by worldwide pants and cbs and now, your friendly street corner cobbler, david letterman! (cheers and applause)

. >> jack hanna's "wild countdown" is sponsored by nationwideinsur. >> hello, everybody, i'm jack hannaming to you from my base camp here at the columbus zoo. and welcome to "wild countdown." i've always been fascinated by creatures with extraordinarysen. look at the size of that one! some can see their prey from miles away. >> from thousands of feet in the sky, these guys can see the eyelashes of a mouse flickering. >> others navigate in the dark with their ears. >> if you stand in the way of a bunch of bats waving your hands, you probably would not hit them. >> whoa! and some find victims just by sensing body heat. oh! i saw it. >> did you see it? >> oh, yeah.

. >>> also ahead, jack hanna with a safari and sara haines hangingu! out with jack this morning.usy weekend. she had a very basis weekend. i mean, how does she do that? that's amazing. >> find out. that's coming up. >> he's right behind her. >>> let's get to amy with the top stories developing right now. amy. >>> good morning, guys. we begin with a massive mudslide in colorado. rescue workers right now are searching for three people who have been reported missing. the mudslide covers an area of eight square miles near the town of collbran. the mud is 250 feet deep in some places. that's deep enough to swallow a 25-story building. there are no reports though of any structures being damaged. >>> and new details about the killing spree in california that left seven people dead including the suspect. all of the victims were students at the university of california santa barbara including three people q were found stabbed in elliot rodger's apartment. rodger left behind a 141-page manifesto and a chilling rant about women who ignored or rejected him. rodger's worried parents contacted

. >> "jack hanna's wild countdown" is sponsored by nationwide insurance. >> hello, i'm jack hanna, comingfrom my base camp here at the columbus zoo. and welcome to "wild countdown." ever since light first appeared on earth, countless species have come and gone. but a few are still around. boy, that thing looks prehistoric. man alive. today we'll discover mammals, reptiles and birds have hardly changed since prehistoric times. boy, look at that fish. he looks like he's been around millions of years. and of course, my blooper of the week. [camels grunting] i got to get out of here.

, i'm jack hanna, coming to you from my base camp here at the columbus zoo.welcome to "wild countdown." it's the law of the jungle: eat or be eaten. these animals can eat 25 to 40 to pounds of meat at one time today, see how seven carnivores hunt down prey. you can see the mother is still breathing real heavy from the kill. scavenge for scraps... do they bite? >> they certainly do. >> ok. and scare up a meal any way they can! >> they're killing machines. these guys are killing machines. >> and later, one of my favorite bloopers. exactly how does the door work? how

. >> "jack hanna's wild countdown" is sponsored by nationwide insurance. >> hi, everyone, i'm jack hannato you from my base camp here at the columbus zoo, and welcome to "wild countdown." most of the animals i meet live in just one kind of habitat, but some just can't make up their minds. whoa! whoa, buddy. today, unique species that split their time between dry land and water. oh, there they are out there. from the florida everglades-- >> whenever you feel like you get ready, we will jump in there. >> did you say we'll jump in there? the river in borneo-- >> oh, look. >> oh, sue. >> i love that. >> and even a waterfall. i have been all over the world

our news continues at 4:30 >> "jack hanna's wild countdown" is sponsored by nationwide insurance. >>eryone, i'm jack hanna, coming to you from my base camp here at the columbus zoo, and welcome to "wild countdown." all baby animals need plenty of love and care from their animal mothers. >> there is a tiny one over there, maybe a week old. >> oh, look at him. look at him. you are right. or their adopted ones. >> so i hand-reared these warts. their names are patrick and patricia. >> and sometimes mothers just need a little help. >> it only has less than a 50% chance of making it to this time next year. >> this bear? >> yeah. >> today, six stories about animal babies guaranteed to make you baby crazy.

hi, everyone, i'm jack hanna here at my base camp on the serengeti plain at busch gardens, tampa bay.dventure," we're going on an african safari to one of the best game parks in the world -- the masai mara. thousands of tourists visit here every year, but they are still outnumbered by big-game animals. i've been to the masai mara before, but never like this. [ african tribal music plays ]

jungle jack hanna pushed hard for the measure to pass.wn hard, thanks to part to this. a flyer from americans for prosperity's ohio branch, which falsely claimed that property taxes would have gone up 105% if issue 6 had passed. we talked to columbus mayor michael coleman about this last night. he said he was surprised to see the koch brothers poking around a municipal tax levee issue and warned they were far from finished. >> this is incredible that the koch brothers are interested in a zoo levy. but that tells me that they're going to be involved in our school board races, they're going to be involved in our city council races. they're going to be involved in over tax issue that comes before the voters in the city of columbus. and they're going to be telling us how we should with deciding how we govern ourselves. >> joining me now, ryan grim, washington bureau chief for the "huffington post." ryan, i couldn't get over this story, the fact that they were like going big on this tax levelevey. so much of this is part of a much larger strat

. ♪ ♪ hi, i'm jack hanna-- here in the outback of central australia, welcome to animal adventures.

i'm jack hanna.i go on the job with some completely captivating canines. ♪ come to the world of adventure ♪ ♪ the animal world of adventure ♪ [ howls ] ♪ you can hear the adventure [ roars ] ♪ the sound of wildlife adventure ♪ [ squawking ] ♪ you can feel the beat ♪ feel the rhythm and heat

. >>> david letterman is next with jack hanna. >> ought to be some interesting animals for sure. see ,,,,,,,,,, ,,,,,,

. >>> in the clus bum dispatcolum dispatch, betty white and jack hanna help cut the ribbon for a newus zoo which will house 150 animals from 20 species. that will be fun. >>> other stories we're watching here for you, people in jordan are preparing to welcome the pope on saturday. it will be be the first stop on his tour of the holy land, one that also includes israel and palestine. tennessee is bringing back the electric chair, the state's governor signing it into law yesterday. it will be allowed if the drugs used for lethal injection are not available. and those drugs are currently in short supply nationwide. tennessee last used the electric chair in 2007. >>> you can never get enough of these. an american soldier surprises his kids at school after almost a year overseas. his daughters cannot contain -- >> they're never letting go. >> they leap into their father's arms there. lunch time surprise. just in time for memorial day weekend. all righty. what house pet could weigh more than 500 pounds. well, talking about a pig, of course. ester. the wonder pig. i mean wonder. look at how