We present the first Middle-Eastern record of Thaumastocoris peregrinus Car­pintero & Dellapé, an invasive pest that feeds and develops only on euca­lyp­tus trees. This species was found in Israel for the first time in Eucalyptus camaldu­lensis stands in October 2014. A survey of several eucalyptus groves was con­ducted in Tel Aviv and its surroundings to assess the geographical dis­tri­bu­tion and host-plant associations of T. peregrinus. We summarize new and old data on this species, i.e., its identification, immature stages, bio­logy, pheno­logy, and damage caused to the host plant.