savannah spiny sugar ant polyrhachis schistacea on a euphorbia terracina carnation spurge

africa ant antennae black brown bug camouflage cape carnation drinking euphorbia eyes farming fauna feelers flora foliage food formicidae geraldton green insect invertebrate leaves legs macro milii mimicking mouth nature parasites pest plant plants polyrhachis savannah schistacea south spiny spurge stem sugar sun terracina town weed