in the evening in Dar es Salaam, the storks, the egrets, the ibises and the crows fly together in the evening air .. at some point the bats of dar es salaam appear among the crows and other birds, into the hot air, whitish barely tinted in the west, in the evening. you can see the feet of those big bats quite clearly, and their heads and necks, as they fly and turn among the buildings, for a moment mistaken for big birds, then unmistakeable: close, but in colour, with heavy bodies alternately lifted and let down .. your bus ..