https://www.google.com/search?q=sirfidi&sca
https://www.parcomonviso.eu/ambiente/la-fauna/gli-insetti/i-sirfidi-del-bosco-del-merlino
https://blog.3bee.com/sirfidi-insetti-travestiti-da-api/
https://it.wikipedia.org/wiki/Syrphidae