Nice job. There was a pretty popular Show HN around this concept called Wildex about a month ago though its not limited to birds.

https://news.ycombinator.com/item?id=47040390

Seek by iNaturalist has also been around for much longer and is (probably) the OG of Pokemon Go with animals - it's intended for kids and is a bit more educational.

https://www.inaturalist.org/pages/seek_app

Depending on the VLM you are using under the covers - I'd recommend snagging a bunch of nature pictures from instagram/etc. and measuring its baseline accuracy. In my experience, individual species of birds can be more difficult to identify particularly the smaller ones.