The Kenya Yellow winged Bat Lavia frons is found in forests and open country and is common in Kenya where it can be seen roosting in Acacia trees.
It is quite often active by day (as with the one pictured on this site) and will, if disturbed, fly long distances in broad daylight. In the picture you can see that the bat has its eyes open observing its surroundings.
It was slowly revolving on an acacia twig and, at first, it looked like a dead clump of leaves but then it flew out to catch dinner. These bats feed entirely on insects.