You probably can run BirdNET-Pi on a Pi Zero, but it will work a lot better on a Pi Model 4B.
The great beauty of having done all the faffing about with the Pi Zero is that when the 4B arrived all I did, literally, was transfer the micro-SD card across, plug in the microphone, and power it up. All worked perfectly first time. And within the hour, it had detected the first bird.
Nothing too remarkable (having deleted an Australian Crake on which it was 75% confident and I was 100% certain) except for the kestrel. I have occasionally seen one, but not often. I guess it was flying over.
The 4B offers other advantages too. The better wifi means that it can connect from outside, which is very nice. The USB microphone needs no adapter. And it is efficient. After about 8 hours, the powerbank is still 65% full. I'm going to call it a day now and recharge the powerbank so it can go to work overnight capturing, I hope, some noctural migrants and maybe a bit of dawn chorus.
This is exciting.
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