About 100 people (citizen scientists) of all ages and backgrounds took part in Malta’s first-ever BioBlitz at the end of August. The focus of this Citizen Science event was finding and identifying as many species as possible in a specific area over a short period of time. For this national first, the targets were invasive alien plants, meaning those plants not indigenous to Malta and which may have been accidentally or deliberately introduced. Some are spreading and can present a threat to local biodiversity. This BioBlitz was organised in the core of the forest area of Buskett and Girgenti by the EU-funded project FAST (Fighting Alien Species Trans-border), in collaboration with Science in the City and with the support of ERA and Ambjent Malta. This Natura 2000 site was specifically chosen for its abundance of alien species. Citizen scientists involved in this Bioblitz made over 270 records of alien plant species in just three days. These observations were then reviewed and curated by the university scientific team involved in this project and were used to build a distribution map showing the locations of these potentially dangerous species. The data gathered during this event...