A crab spider with white and pink pigments.

A crab spider with white and pink pigments.

Crab spiders are masters of disguise.

Crab spiders are masters of disguise.

Insects looking for a nectar meal had best beware.

Insects looking for a nectar meal had best beware.

This rose-colored crab crab spider is the sneak attack specialist of the flower garden.

This rose-colored crab crab spider is the sneak attack specialist of the flower garden.

A close-up  of a Goldenrod crab spider showing its four pairs of eyes.  The forward most eyes are capable of forming images. This is an unusual feature for eyes of this structure, called pigment-cup ocelli. The other six eyes are only capable of telling which direction the light is coming from, with the help of a reflective membrane.  They are not compound eyes (as are seen in insects), which have numerous lens-like facets.

A close-up of a Goldenrod crab spider showing its four pairs of eyes. The forward most eyes are capable of forming images. This is an unusual feature for eyes of this structure, called pigment-cup ocelli. The other six eyes are only capable of telling which direction the light is coming from, with the help of a reflective membrane. They are not compound eyes (as are seen in insects), which have numerous lens-like facets.

A slender bodied crab spider.

A slender bodied crab spider.

This plant dwelling green crab spider looks capable of short bursts of speed to catch prey on a leaf or stem, rather than a flower.

This plant dwelling green crab spider looks capable of short bursts of speed to catch prey on a leaf or stem, rather than a flower.

Some crab spiders are adapted to be ground dwellers.

Some crab spiders are adapted to be ground dwellers.

Goldenrod Crab Spiders can change color from yellow to white to match the flowers they live on.  This ability involves transport of yellow and white pigments to the skin surface using information gathered from the eyes, as a spider with painted eyes cannot change its color.

Goldenrod Crab Spiders can change color from yellow to white to match the flowers they live on. This ability involves transport of yellow and white pigments to the skin surface using information gathered from the eyes, as a spider with painted eyes cannot change its color.

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