I have on of the coolest spiders in my garden. Misumena vatia, or Flower Spider as it is commonly known. It does not make a web but pounces on pollinating insects visiting flowers. It strikes by injecting venom.
But that is not the coolest bit about them.
It is able to change colour to match the flower it is sitting upon! How's that for extremely impressive?
"The color change is made possible by secreting a liquid yellow pigment into the outer cell layer of the body. On a white base, this pigment is transported into lower layers, so that inner glands, filled with white guanine, become visible. If the spider dwells longer on a white plant, the yellow pigment is often excreted. It will then take the spider much longer to change to yellow, because it will have to produce the yellow pigment first. The color change is induced by visual feedback; spiders with painted eyes were found to have lost this ability.
The color change from white to yellow takes between 10 to 25 days, the reverse about six days."
Okay, it can only change from yellow to white and vice versa. But that still is pretty mind-blowing. How about those little 8 legged chemical factories, ladies and gentlemen.