You know 'em, right?
Those wee spiders which have the ability to change colour to match the (generally) yellow, white or green flowers and buds they lurk on.
You know. Those little, bald, pale, cream, yellow or white spiders, sitting their on the end of pale flowers, with their front legs outstretched, ready to quickly embrace any insect that fails to spot their camouflage.
Camouflage honed over millions of years of evolution, that is.
Our crab spiders are crap at all that.
Crap spiders, here.