A report is given of the occurrence of Odonata at a site in Kenya comprising a stream which has been dammed to form a small reservoir. Observations have been made at the site on six occasions during the last ten years. Altogether 10 zygopteran and 35 anisopteran spp. haVe been observed at the site, and evidence of breeding by 8 zygopteran and 26 anisopteran spp. has been obtained. 17 spp. were reproductively active only at the stream and 9 spp. only at the reservoir. A further 7 spp. were active in both habitats. Patterns of daily activity of some of the commoner spp. have been analysed and evidence for temporal partitioning among some Zygoptera is described.