Not the most conventional application for self-hosting, but thought it might make for a fun weekend project for someone.
BirdNET-Pi is built off the back of Cornell University’s BirdNET Sound ID neural network model (https://birdnet.cornell.edu/). It can be used to classify what birds are in your vicinity by listening to their calls.
It largely depends on the surrounding environment in which you are going to place the device. In my case, I need to use a shotgun due to a highway nearby.
Careful with the birds!