We present the first Middle-Eastern record of <em>Thaumastocoris peregrinus</em> Carpintero & Dellapé, an invasive pest that feeds and develops only on eucalyptus trees. This species was found in Israel for the first time in <em>Eucalyptus camaldulensis</em> 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 <em>T. peregrinus</em>. We summarize new and old data on this species, i.e., its identification, immature stages, biology, phenology, and damage caused to the host plant.