Abstract
Trithemis annulata (Palisot de Beauvois, 1807) is first reported for the Region of Trentino-Alto Adige/Südtirol in the southern Alps. A large breeding population was observed at Lake Caldaro from August to October 2023, along with two solitary males at other lakes. No other records of T. annulata were made at 16 other locations within the region. This represents the first record of this species within the Alps and thus exemplifies the rapid range expansion this species has undertaken across Europe during recent years.