For about forty years I taught at first, second and final stages with an emphasis on invertebrate biology, ecology, freshwater biology and the evolution of behaviour, the last being my special interest subject taught at the advanced level.My personal research concerns the ecology and behavioural ecology of holometabolous insects and particularly the adaptations of chironomid midges to rain pools in tropical Africa and the evolution of the mating systems of this same taxon.Mating takes place in aerial swarms and hence represents a relatively neglected type of mating system hinging on aerobatics rather than the better studied systems depending on sexual display.