Do you know xeno-canto?
It's a great website to listen to sound recordings of nearly all bird species of the world.
Right now, I'm just amazed by this Subalpine Warbler (Sylvia cantillans):
https://xeno-canto.org/725727
Worth checking out! you can also browse by region or listen to random recordings

#birding #sound #soundbirding #SubalpineWarbler #SylviaCantillans #xenocanto #birdsong