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In this study, we update the knowledge about wild bees of the genus  Hylaeus  in the Canary Islands and discuss the possible effect on the phenology of exotic species on the endemic ones. Our records come both from entomological samplings and citizen science through photos registered in social networks. An additional molecular approach was performed to confirm correct identification and analyze their geographic origin. Two new exotic species, Hylaeus (Paraprosopis) pictipes Nylander, 1852 in Tenerife and Hylaeus (Spatulariella) punctatus (Brullé, 1832) in Tenerife and Gran Canaria have been detected. In addition, we provide new records of  Hylaeus (Spatulariella) sulphuripes  (Gribodo, 1894) in Tenerife and Gran Canaria. All three species show a flight season extending from late spring to early winter. Most observations were made in anthropized areas, visiting both native and exotic plants. Exotic species were localized on the larger islands of the archipelago where maritime traffic is higher, being the most likely route of entry. Molecular data suggest two independent arrivals of  H. pictipes  to Tenerife from the Iberian Peninsula, while  H. puntactus  would have arrived from central Europe. There is little overlap with the phenology and habitat of the endemic species, so there does not seem to be a potentially significant negative effect on them.

Presence of exotic species of the wild bee genus Hylaeus (Hymenoptera: Colletidae) in the Canary Islands revealed by molecular and citizen science