Some say crab spiders derived their common name from the way in which they move sideways like a crab. Others liken their first two (longer) pairs of legs to those of crabs. Still others feel their short, wide, flat bodies resemble those of crabs. Whatever the source of their name, this group of spiders consists of ambush predators. Instead of stalking their prey, or catching them in a silk web, crab spiders tend to stay put (often on flowers), and blend into the background as much as possible in order to pounce on unsuspecting prey.
In order to meet with success, crab spiders camouflage themselves extremely well. Some resemble bird droppings, while others look like fruits, leaves, grass, or flowers. The Goldenrod Crab Spider, a fairly common white or yellow crab spider with pink markings, is capable of changing its color from white to yellow over a period of days, depending on the color of the flower it is on. (Crab spiders often remain in the same location for days and even weeks.) The likeness of the pictured crab spider to one of the Turtlehead’s buds is surely not coincidental.
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