The chal¬lenge for con¬serva¬t¬ion now in Con¬go is to in¬ter¬vene be¬fore losses be¬come “defini¬tive,” said John and Terese Hart of the Lukuru Wild¬life Re¬search Founda¬t¬ion in Kin¬sha¬sa, Dem¬o¬crat¬ic Re¬pub¬lic of Con-go, who led the proj¬ect. They not¬ed that spe¬cies with small ranges like the lesula can move from “vul¬ner-a¬ble” to “se¬ri¬ously en¬dan¬gered” in just a few years.