(Adds codes) By Tim Cocks June 3 (Reuters) – Wildlife experts found eight new species of dragonfly, three unknown grasshoppers and some 60 new butterflies and moths in vivid hues during a trip to Angola’s Lisima plateau in February, a conservation group said on Wednesday. The Wilderness Project visited the waters that flow through the plateau and which feed four of Africa’s major rivers: the Congo, Okavango, Zambezi and Cuanza.