Bark Crab Spider
Scientific Name: Bassaniana utahensis
Order & Family: Araneae: Thomisidae
Size: 4 to 7 mm (males are typically smaller than females)

Natural Habitat
Commonly found on the bark of trees, logs, and under foliage in wooded areas or gardens where its camouflage is effective.
Diet & Feeding
Carnivorous; it is an ambush predator that feeds on a variety of small insects including flies, beetles, and ants.
Behavior Patterns
Unlike many spiders, it does not spin a web to catch prey. Instead, it relies on camouflage to wait motionless for prey to come within reach and then strikes with its front legs.
Risks & Benefits
Benefits the ecosystem by controlling pest insect populations; they are generally harmless to humans and rarely bite unless handled roughly.
Identified on: 5/11/2026