Haven't had the chance to test the sound id on any birds yet, but I've downloaded a few packs (their directory of local birds basically) and I love listening to all the call variations. I love how each call comes with the name and date someone recorded it. Feels more personal and crowdsourced. I don't know how new calls are added but hopefully I'll be able to record something and get my recording in there. Overall, it's a nice quick spark of joy in my day.