Predation on adult odonates by invertebrates has been reported several times (for an overview see G. REHFELDT, 1995, Odonatol. Monogr. I: 1- -175). On the contrary, vertebrate predation is less well documented and mostly limited to birds, with fewer cases in fishes, amphibians, reptiles and mammals (see references in REHFELDT, 1995. ibid.). This is because these other vertebrate classes have mostly non-flying members. As a result, records of predation by ground-living mammals on adult dragonflies are rather rare, and given for only one carnivore, the domestic cat (see REHFELDT, 1995, ibid.). We report here on several cases of cat predation on adult A. cyanea and discuss these observations in the light of the risk-sensitive behaviour of the species. During 1995 we noted three occasions of domestic cat predation on adult A .cyanea. The first of these was under artificial conditions. A male raised in an aquarium emerged in February 1994, when it was too cold to release it. Therefore it was kept in the living room where it was very active. The dragonfly was twice caught by the house cat, once while flying against the window and once while patrolling around the table. We observed the other occasions in gardens. The local cat caught and killed a male in July 1994 in a private garden in Merchtem (Belgium) and the same thing happened on 3 September in another garden in Merchtem. On all occasions the cat was familiar with the place and had watched the male for some time before trying to catch it. In the last record the male was able to escape the first time, but stayed flying in the same area and was finally caught by the cat.