Cymothoe caenis (Drury, 1773)
OK. First, I want to make it clear that at times, in certain locations, C. caenis is stupidly, annoyingly, abundant. They can be *everywhere* and soon you begin to assume everything similar is C. caenis, which probably means other much more interesting species are being overlooked and you don't want to be doing that. Or, you can try to net everything and find that 90% of the time it's just another caenis and, well, that's just wasting time and energy. You see, you'll only be in this particular location for a day, and it's rainy season, and the butterflies are only truly active when there's a break in the clouds, so time is limited! It's likely there are upwards of 350 species to be found in this locality, maybe not all right now, but you'll never know if you let the caenis swirling and chasing each other everywhere distract you. Oh great, probably another caenis in the net... no, wait, that's a new female form of Euryphura chalcis. Nice! (Sorry... it's a recent experience.)
First a few males. Despite my above comments, if you stop to appreciate them, they are quite classy things.
20/VII/2015 Mbau, Nord Kivu
11/IX/2015 Q. Malepe, Beni, Nord Kivu (0°29'N, 29°28'E) 1180m
This last male was caught during a mass migration, south to north. Curiously, during those few days I only saw white females. In 2009, the West African population was split into a new species, C. druryi, based on DNA and differences in genitalia. The initial hint that this cryptic species existed was the monomorphic female.