." ♪ >>> famed animal photographer joe sarturi has used his career to tell the story of some of the mostxotic creatures. >> and now his photos to save the lives of endangered ones. we're up all nightline with gio benitez. >> it's like a $6,000 camera, don't you know that? >> reporter: getting that perfect shot isn't always easy. just ask wildlife photographer, joel sarturi. >> see how it all fits? >> reporter: i heard about a crane getting a little testy with you. >> there was a hornbill trying to draw blood a little >> reporter: it's all in a day's work. >> the goal is to get all 13,000 or so species that are in human care. 6500 down so far. >> reporter: his photos and how he captures them are the subject of a new three-part series, rare photos of the creatures. sartore and his team traveled to five couldn't nents photographing these creatures in captivity. the results are these stunning portraits. some of sartore's images have gone viral, even projected onto major world landmarks like the vatican and empire state building. you're shopping. >> i am shopping. >> reporter: we met him at t