leading the tracking charge is paul van dam, a biologist and director of bon agua, a bolivian ngo. >>to know how far they travel, how far the males travel searching for females, searching for family, searching for food. >> reporter: and just minutes after boarding our canoes -- a downpour. >> we are now in the rain. a bit unlucky. but rain does not interfere in the capture of the dolphin. >> reporter: the ride out is bumpy. after an hour, the fishermen find a lookout point for the elusive dolphin. >> we are now setting up our camp. so the fishermen are preparing the setups to put the nets to capture the dolphins. >> reporter: while some work frantically through the cold rain, others take refuge in the much warmer amazon river. when the rain finally settles, it's go time. the team starts by checking its vitals. right now they have to work as quickly as possible, they also want to make sure to keep it very calm. that's why i'm talking very slowly right now. with the examination complete, the tagging begins. each tag will ping data back to a satellite once a day.drill, c your toolbox, be

leading the tracking charge is paul van dam, a biologist and director of a bolivian ngo. >> you need to know fohow far travel, searching for females, family, food. >> in just minutes after boarding our canoes, a downpour. >> we are in the rain now. a little unlucky but rain does not interfere in the capture of the dolphin. >> the ride out is bumpy. after an hour, the fishermen find a look out point for the elusive dolphin. >> we have a tent so the fishermen preserve to capture the dolphins. >> while some work franticly through the cold rain others take refuge in the much warmer amazon river. when the rain finally settles, it's go time. >> team starts by checking its vitals. >> right now they have to work as quickly as possible and they want to make sure to keep it very calm. my talking is low right now. >> with the examination complete, the tagging begins. it will ping back to a satellite once a day. this drill commonly found in your toolbox becomes vital to tracking these mammals. >> first thing we had to do was disinfect the whole area. one guy right here, all he's doing is holding