but the parkrk is in danger.onservationists rian and lorna labuschagne have been working in national parksks for over 30 years. n now they're here in te serengeti, fighting to protetet labusits ananimal populations.in rian: : any illelegal poachinr killing g of animals i is a prm for that ecosystem, because it puts it out of balance. here in the serengeti, here they use this snaring method which is devastating on big populations of wildlife. everything will be killed. mostly wildebeest, zebra, impalas, but if they put up a whole snareline somemetimes ovr 100 snares, what ever goes in there. reporter: this patrol unit is made up of park rangers and former poachers. they've collected more than 100 snares today. most of ththe poachers come frm villages on the edge of the park. rian: they know how to do it, they have got years and years of experience.. animals walk into the snare and the cablewire pulls tight around the neck, sometimes around the foot, and the animal is then strangled and killed. reporter: the animal