Years ago my mum owned a green, what you would nearly call hi-viz, fiat. One hot summers day we went to the beach but had to bail out and retreat. Since these little buggers were there in there by the millions, never seen that many in one place. We jumped into the car, which were now more orange/black that hi-vis green. Even before we started the engine and put on the fans, it was a very hot day, they were crawling into the car, like in a horror movie.
The following winter we still had ladybird "flying" out when we turned on the heater in the car.