Nature cameras are relatively hard to conceal (from humans), whereas AirTags are very easy to conceal.

They are also very bad for tracking compared to what you can get on Aliexpress/eBay/Amazon (which are the same tbh).

For about the same price you can get a device with a SIM card and GPS/GLONASS and _zero_ ways to detect it.

What's the battery life on that though? The appeal of AirTags is that they last a year and work anywhere that has an iPhone nearby.

Depends on the device. Some are active all the time, some can sleep and only wake up to get their position fix every hour or so. It's not exactly rocket science to adjust the programming.

And if you're stalking someone for a year, you'll have ample options to swap the device to a new one with a fresh battery.

Can you give a couple of example products? I am very curious.