I suspect once the poachers become aware of the sensors, they'll disable them first. Of course, if you monitor them for a heartbeat, and they disappear, this ca

I suspect once the poachers become aware of the sensors, they'll disable them first. Of course, if you monitor them for a heartbeat, and they disappear, this can be a sign of poachers... ;-) Then they'll likely figure out how to disable the sound without killing the device, so then you'll figure out how to tell if that has happened... and things continue.