Who knows, it could be that bird sensitivity to radar has to do with the type of bird in question. Perhaps some birds more sensitive (migrating birds for example) and lokal birds not. Its just a hypotese that could be scientifically investigated. Or perhaps let 'mythbusters' do some experimenting.
I've been standing cleared for takeoff with a flock of birds on the runway. Then turned on the wx radar, nothing happened.
They seem to be sensitive for the firetrucks watergun though
