I’ve been poring over this website: exo-canto, listening to various bird calls. In this valley we’ve identified just under thirty different birds by sight, and the cuckoo we’ve only ever heard.
I can identify some birds by sounds but not much, so there could be plenty of birds that I hear and yet never see that I can’t identify. So I’m relaxing here, listening to some bird songs, getting familiar with their sounds. And maybe I’ll hear something I’ve never noticed before?