I really like this app, but last night I had an encounter in the dark with the most weird alien sounding bird, that uses so low frequencies that the app couldnt make anything out of it.
I realize this is a fault of my phones mic and not the app, btw!
I think the bird was one of the snipes (dvärgbeckasin?) because I met them before.
Did you actually see the bird? Some animals make sounds that are deceptively similar to birds (ex chipmunk chirps). Merlin won’t recognize these as “not a bird”; it just doesn’t recognize the sound at all.
Usual disclaimer IANABL (I am not a bird lawyer)