I’ve been trying to learn how to identify birds by their songs, it wasn’t going well until I discovered Merlin. It allows you to record what you’re hearing and picks out the individual birds. The one highlighted in yellow is the active/loudest bird singing.

Screenshot of Merlin app during a recording. Sound wave at top followed by a list of all the active birds including name and thumbnail picture. The birds listed are: Eurasian Blackbird, House Sparrow, Eurasian Tree Sparrow, Barn Swallow, European Greenfinch.