Weird caveat, but I wonder about the legality of this in various jurisdictions. In my own state in the US, it is generally illegal to record audio without consent. There are various interpretations of this, and probably putting a sign up saying "audio recording in progress" is enough, but it's worth considering.
To be clear, even private, indoor security cameras are not allowed to record audio in my state, though few people realize this. Security camera websites and software do nothing to make this obvious.
Those laws are usually about eavesdropping, and most states (e.g. my state of Illinois) have carveouts for a "reasonable expectation of privacy" (though I found something saying Montana doesn't?). Recording people inside an Illinois hotel room, felony eavesdropping. Recording audio in the hotel lobby, irrelevant. I think you'd have an extremely uphill battle that says a mic outside was "knowingly and intentionally" used to eavesdrop. You would then also need to demonstrate one of:
1. it was done purposefully to eavesdrop (no, it was meant to record birds)
2. it was done to record/transmit/overhear the conversation
3. even if inadvertent, someone used/disclosed anything in the private conversation heard
If all the audio is getting processed to be maybe this or that bird, and the raw feed isn't stored, let alone rehosted, I don't think there's an issue.
Even then, you'd still need someone to bring an action. No one is going to bring an action over a private bird monitor.
It might be nice though if the "live audio" detected human voices and auto-muted them. If you're making a live audio feed available you should post a notice for sure.
Yup. I myself get along fine with my neighbors and wouldn't be concerned, per se. I simply think folks should be aware. There's plenty of lawsuits in my state regarding "illegal wiretapping" and not everyone has good relationships with their neighbors.
To be clear, even private, indoor security cameras are not allowed to record audio in my state, though few people realize this. Security camera websites and software do nothing to make this obvious.