BioBlitz Azores: Multitaxa inventories of the biodiversity of “Jardim Duque da Terceira” (Angra do Heroísmo,Terceira Island, Azores, Portugal).

This dataset represents the inaugural output from the "BioBlitz Azores" initiative, launched in 2019 with the objective of enhancing understanding of the Azorean biota and fostering community engagement. This initiative draws participation from volunteers, amateur naturalists, students, and families, aiming to cultivate community bonds and heighten awareness of biodiversity and conservation efforts in the Azores. The project commenced with its first session in the Public Garden "Jardim Duque da Terceira" (Angra do Heroísmo, Terceira Island) and held its second session in the same location in 2023.In our study of lichens, we identified 72 taxa. For vascular plants, our research identified 54 taxa, which included one endemic, one native, three of indeterminate status, and 49 that were introduced.Our arthropod survey produced an inventory of 96 taxa, with 76 classified to the species or subspecies level. This group included three endemic taxa, 32 native taxa, and 42 introduced taxa. A significant finding was the rare endemic spider, Savigniorrhipis acoreensis Wunderlich, 1992, which inhabits the canopies of endemic trees in native forests at mid to high elevations, demonstrating its specific habitat needs and the unique ecology of the region.In terms of birds, we recorded 14 taxa, consisting of seven endemic Azorean subspecies, two native species, and four introduced taxa.Three freshwater vertebrates were recorded during the survey, all of which are exotic species that have been introduced to the local ecosystem.