Thank you for sharing this! It doesn't sound like they automatically go in an kill all the birds within the control area like I've read elsewhere. I also appreciate knowing how big the control/containment area is. I love that they use metric distances.

I wonder if it's a 6+ mile diameter or radius on the zone. I read something the other day that mentioned a 3 km radius but that wasn't in the US. I live near a nuclear power plant and their emergency plan stuff describes parts of their plan in radius distances. If you're within a 5 mile radius X applies to you, if you're within a 15 mile radius Y applies to you. It sounds like it's similar with the AI containment areas. If you're within the 10 km zone X applies, if you're in the 10-20 km zone, Y applies to you.
Either way, the closest case in NC so far is 150 miles away so that's good for now.