26 spp. were observed on the cam- pus during Sept. 1987 – Feb. 1988. and Aug.- Sept. 1990. Of these, proof of breeding on the campus was obtained for 16 spp. and there was strong circumstantial evidence of breeding in at least a further 2 spp. 5 bred only in permanent habitats and 7 only in temporary habitats, the remainder probably doing so in both types. 16 spp. were sexually active at the largest habitat, a seasonal lake. 5 further spp.. although commonly present, showed no sexual activity at campus sites.