What does HackerNews think of BirdNET-Pi?
A realtime acoustic bird classification system for the Raspberry Pi 4B, 3B+, and 0W2 built on the TFLite version of BirdNET.
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PHP
Birdnet Pi [0] is a pretty populair ready to go solution for this also
I had https://github.com/mcguirepr89/BirdNET-Pi running last summer with great success. Might be worth a look.
The birders are super ahead of the curve. Check out this Rpi implementation of BirdNet: https://github.com/mcguirepr89/BirdNET-Pi
Some other options for low-cost backyard sound/biodiversity monitoring are:
https://www.openacousticdevices.info/ https://carbonrewild.com/