Bagaza virus emerged in Spain in 2010 and was not reported in other countries in Europe until 2021, when the virus was detected by molecular methods in a corn bunting and several red-legged partridges in Portugal. Sequencing revealed high similarity between the 2021 strains from Portugal and the 2010 strains from Spain.
Keywords: Alectoris rufa; BAGV; Bagaza virus; Emberiza calandra; Portugal; birds; flavivirus; outbreak; viruses.