The shoreline of Lake Naivasha is rimmed with beautiful yellow-barked 'fever' trees (Acacia xanthophloea). It is the highest lake of Africa's Great Rift Valley and has the reputation as an ornithologist's paradise; it hosts some 400 different species of birds. In this picture white-necked cormorants and Egyptian geese are very much in evidence while a hippo keeps a watchful eye offshore.