for the past year, luis arranz has been working here for the world wildlife fund for nature.s had manany years of experience dealing with nature conservation in crisis regions. elephants are a favorite target for poachers. the animals in the clearing are restless. >> we can't do a lot. i mean, we h have rangers.s. we are tryining to stop the poachersrs. but if the traffffic of ivory doesn't stop, we arere going o lose all the elephants. >> last year, 21 elephants were killed by poachers. that's not m many compared to other countries in africa. confiscated weapons and tusks are put in authorized storage. >> this is one of the biggest we have. it is near 17 kilograms each. so a lot of moneney for the poachers. >> arranz has spent 37 years working as a conservationist in africa, and during that time, he's observed how elephants are gradually disappearing from the continent. >> the last elephants in central africa is here where we are. the rest of the country is empty. the poachers have finished with all of them, and we know that in the future they will come here and they will tr