| | niche separation was studied in two sympatric sunbird species in the kivu highlands (republic of zaire, africa). cyanomitra verticalis and nectarinia kilimensis occur together in many parts of east and central africa and live, at least in the study area, in the same habitat. nectarinia kilimensis is somewhat bigger and heavier than cyanomitra verticalis. bill size and shape are almost identical; small differences cannot be attributed to ecological or other facts.the food of both species consists ... | 1975 | 28308821 |