Interdisciplinary project deals with pollination systems in afromontane area in Bamenda Highlands (SW Cameroon). The main objective is to find out plants' and pollinators' traits, which are important for mutual interactions, and to determine degree of specialization between individual actors with emphasis on sunbird-plant relationships. The results should contribute to generalization of knowledge on specialization of pollination systems, so fare based on New World hummingbirds. The impact of pollinators on reproductive success of plants is assessed by comparing seed production of plants, with pollinators being either allowed to feed or experimentally excluded. Main study topics: