> Are you equivalently comfortable tracking humans who do not ponder privacy and/or realize they are being tracked?
Not OP, but:
Even speaking as a strict vegan, there's a pretty big difference between a human having not thought about privacy much, and an animal that literally has different conceptual experiences of the world. I really don't see the equivalence.
It's like getting upset about a cat walking into the bathroom while their owner is pooping; these are creatures with completely different mental models of the world and to me part of respecting animals is not trying to force all of their mental models through a human framework. Again speaking as a vegan, that doesn't mean we can just ignore their experiences of the world or that we should be fine with causing them physical or mental pain, but I really don't believe there is any conceptual mapping between modern human privacy notions and animal privacy.
If people want to argue the devices are causing discomfort or that it's risky to trap/tag the birds without injuring them, then fine, those are different arguments. If they want to argue that magpies in specific do have some kind of mental model of privacy or norm that we're violating, then they can make that argument as well (although I suspect there isn't any real evidence for that). But no, I don't believe that it's violating their privacy to watch them, and I don't think that a human who is being secretly tracked or who hasn't thought much about privacy is the equivalent to a magpie's internal model of the world.
At the very least, if we're going to talk about mental torture for an animal, that conversation should be framed around what we know about the animal's point-of-view, not based around what a human would feel. A lot of mental harm has been caused by us assuming that animals just work the same way that humans do, and in using that assumption to decide that certain actions towards them are good or bad based purely on what we would feel in their position.