I don't know if any of you have ever played the game IL-2 Sturmovik - or IL-2 Sturmovik: Forgotten Battles - (I know its silly comparing a game to real life, but this WW2 plane simulator is frighteningly realistic), but in that game, it is rather easy spotting ground targets in wooded areas and cities, as long as you're up in the air and not crashing into said wooded area. Granted, tanks are tough eggs to crack without 37mm to the rear or top or a 500 KG bomb up the tailpipe, I must admit they're not incredibly difficult to spot, even with camo.