So you take a Google Map, you divide it up, work out how far they can fly, and make sure you're releasing such that you get coverage of the area, and then you go back, and within a very short space of time, you're bringing that population right the way down.
Så man tager Google Map, man deler det op, regner ud hvor langt de kan flyve, og sikrer at man sætter dem ud så man dækker området, og så tager man tilbage, og inden for meget kort tid, nedbringer man bestanden.