Avian CCTV .

It's estimated there are 500,000 CCTV cams in & around London. Berlin has few but as times change they are slowly being introduced. Personally, I'm in favour since have nothing to hide & if they increase security that's fine by me.
Meanwhile in daylight Berlin has Avian security .These living feathered crows miss nothing .They call out to those on the ground if crowds are approaching or a  'known to them, unfriendly face' . One particular call is like a warning klaxon & it does the trick . If you live in a city or town where there are crows , look up and you'll be on crow cam .