This was correct a number of years ago. Feels a little strange we can just do an API call for bird recognition now.
Not condoning people make this app, just thinking about how fast things have moved in just a few short years.
Merlin[1] (also from Cornell Lab of Ornithology), on the other hand, has both image and sound ID. I haven't used either, so I cannot compare the quality of results from Merlin vs. BirdNET for sound ID, but afaik only Merlin has image ID.
https://code.flickr.net/2014/10/20/introducing-flickr-park-o...