Phegea53-3. Knowing large moths better: <i>Coscinia chrysocephala</i> (Lepidoptera: Erebidae) can provide an ethological insight into the understudied Erebidae in Bulgaria.

On many occasions, behaviour is difficult to observe, especially flight, which is hard to track in field conditions. Despite being a major evolutionary adaptation, attention is mainly drawn to its fundamental locomotory function. The predominant zoogeographical exploration of flight results in overlooking some of its subtle evolutionary aspects, especially at a much smaller ecological scale, e.g., old garden habitats. Thus, it would be a worthy approach to look into observational data for species that exhibit odd flight behaviour, reflect on what purpose it potentially serves and address the likely mechanisms triggering and affecting specific flight behaviour. The current article describes a single occurrence of <i>Coscinia chrysocephala</i> (Hübner, 1810) on 05.ix.2020 in the town of Byala Slatina, Bulgaria (the author's garden). This species account seeks to demonstrate the importance of detecting ethological details, which may provide meaningful ecological and evolutionary data that can also be associated with other closely related taxa. In addition, the role of small and ecologically preserved garden habitats as sources of entomological knowledge is further reinforced by considering the habitat mosaic as a factor related to the occurrence in question.