Every now and then, something pops up on HackerNews that you did not expect to pop up on HackerNews.
Recently, that was Merlin, an app that lets you ID birds from their songs. I’ve been using this app for a few years and have recommended it to many people.
When I hear something I don’t recognise, I get Merlin out. You can see the sound signatures in real time, and pictures of birds will start appearing below as they’re IDed.