Theoretical-practical workshop for the identification of common Portuguese butterflies, suitable for all those interested in participating in the Citizen Science Project “Census of Portuguese Butterflies”. Very focused on the identification in the field of common species of butterflies, this activity will also let you know about the European butterfly monitoring plan, its methodology and the eBMS platform for data recording. The activity will have a theoretical part, followed by a field trip. After this workshop, participants will be able to participate in the Census, if they wish!