we visited one in papua new guinea.'s a place that happens to be home to an unusual and endangered animal that's never been captured on film until now as dan harris reports in a presentation for our series "into the wild." >> reporter: if you want to get a real close-up look at what's known as the ghost of the forest, one of the most rare, beautiful and elusive creatures on earth, the tree kangaroo, you have to climb way, way up into a towering tree. >> then one guy will climb up close to her and they'll make noise so that she'll come down. >> reporter: she'll jump? >> yeah. >> reporter: all the way down? >> she could. they do that in the wild. they have the ability and when they land they sort of stop for a second. >> reporter: that's when you get them. >> that's when we get them. >> reporter: the tree kangaroo and the man trying to scare her down are so high up that we can barely see them from the ground. >> she's going to try to figure out how to get away. okay. okay. there she goes. >> reporter: she jumps free falls

we have choppered into a cloud forest in the mountains of papua new guinea.uide is lisa daybeck, an american biologist who has dedicated her life to saving the tree kangaroo. >> just be really careful. there's holes. >> reporter: she first saw these animals 20 years ago at a zoo in the u.s. >> i fell in love with them then. plus they're beautiful. the more i learned about them the more i knew that i wanted to help them. >> is it true that you went eight years without seeing one in the wild? >> yes. >> reporter: finally a few years ago, daybeck and her team managed to get radio collars on some treeroos. >> it's so hard to find them. >> she's tearing right out of there. >> good. she's saying, hi, dan. okay, okay, there she goes. >> reporter: that's when the guy up in the tree gets close enough for her to jump. once she's on the ground, the men rush in to grab her by the tail. >> easy, easy. easy. >> reporter: there's a field veterinarian here to make sure the animal is okay and to check if she has a baby in her pouch. >> no? okay, good. whew. okay. so now they'