Crab Spider

Scientific Name: Thomisidae

Order & Family: Araneae, Thomisidae

Size: Typically 4-10 mm for females, males are usually smaller.

Crab Spider

Natural Habitat

Found on flowers and foliage, where they lie in ambush for prey. Some species are well-camouflaged to blend with their surroundings.

Diet & Feeding

Carnivorous. They are ambush predators that wait on flowers or leaves to catch insects like bees, flies, and other pollinators that visit the plants.

Behavior Patterns

Crab spiders are named for their crab-like appearance and ability to walk sideways or backward. They are not web-builders for prey capture, instead relying on camouflage and quick strikes to catch their food.

Risks & Benefits

Generally considered harmless to humans, as their venom is not medically significant. They benefit ecosystems by preying on various insects, including some pests, contributing to natural pest control.

Identified on: 10/24/2025