Goldenrod Crab Spider, Flower Crab Spider, White Death Spider
Misumena vatia
Thomisidae (Crab Spiders), Order Araneae
Physical Description
A medium-sized spider with a distinctive crab-like appearance. Females have a large, rounded, bulbous abdomen and a flatter cephalothorax. The first two pairs of legs are significantly longer and stronger than the back two pairs, adapted for seizing prey. The body is relatively smooth with some fine hairs.
Size Estimate
Females: 6-11 mm body length; Males: 2-4 mm. This specimen is an adult female with a broad leg span reflecting its ambush readiness.
Coloration & Markings
This specimen is white with two bright reddish-pink dorsolateral stripes on the abdomen. This species is famous for its ability to change color between white and yellow to match its floral background; the red markings are a common variant in the white phase.
Web Type
None. These are hunting spiders that do not spin webs to catch prey, though they produce silk for safety lines and egg sacs.
Eye Arrangement
Eight small eyes arranged in two curved rows of four. The eyes are set on small tubercles (bumps), providing a wide 180-degree field of vision for detecting approaching insects.
Leg Characteristics
The front two pairs of legs are long, powerful, and held out to the sides in a 'crab-like' posture. They are adapted for a sudden 'embrace' to pin down prey many times the spider's size.
Venom & Safety Information
Venom Information
Contains neurotoxins specialized for fast immobilization of insects. The venom is highly effective on arthropods but not considered dangerous to humans.
Medical Significance
Low. Harmless to humans. A bite might cause minor localized swelling or redness, similar to a bee sting, but requires no medical attention unless an allergic reaction occurs.
Safety Recommendations
No special precautions are needed. They are safe to observe closely. If one is found on cut flowers brought inside, simply move the flower back outdoors.
Habitat & Behavior
Habitat & Range
Common across North America and Eurasia (Holarctic). They prefer open sunny areas with plenty of flowers, such as gardens, meadows, and forest edges.
Behavior & Temperament
A quintessential sit-and-wait ambush predator. They remain motionless on flowers for hours. They are docile toward humans and generally will not bite unless pinched or handled roughly.
Diet & Prey
Generalist predators of pollinators. Typical prey includes honeybees, bumblebees, butterflies, moths, flies, and hoverflies. They use potent venom to quickly immobilize large, struggling insects.
Seasonal Activity
Most active from late spring through late summer, coinciding with the peak blooming periods of wildflowers and garden perennials.
Description
The Goldenrod Crab Spider is Nature’s master of disguise on the blossom. This stunning white and red female is a specialist hunter that blends into flowers to ambush pollinators. Its wide posture and powerful front legs allow it to tackle prey much larger than itself, making it a common and fascinating sight in summer gardens.
Key Features
Crab-like stance, significantly longer front legs, ability to change color (white/yellow), and lack of a web.
Similar Species
Misumenoides formosipes (Ridge-faced Crab Spider), which has a distinct transverse ridge on the 'face' between the eyes.
Life Cycle
Mating occurs in early summer. Males are much smaller and must approach cautiously. Females lay eggs in a flattened silk sac attached to a folded leaf. Adults typically live for about one year, dying after the first frost.
Ecological Importance
Significant role in controlling insect populations. While they occasionally eat beneficial pollinators, they also prey on garden pests like flies and plant-eating beetles.
Conservation Status
Not listed (Least Concern). They are widespread and common throughout their range.
Interesting Facts
Females can change from white to yellow over several days by secreting a liquid yellow pigment. Reversing from yellow to white takes much longer (up to three weeks) as they must excrete the pigment.
Photography Tips
Focus on the eyes and the front 'raptorial' legs. Shooting at a slight downward angle highlights the abdominal markings and the spider's position within the flower's structure.
Identified: 2026-06-13T13:26:26.704334