Arachnid
Tan Crab Spider
Xysticus feroxAlso known as Brown Crab Spider, Fierce Crab Spider
Tan crab spiders prowl leaf litter and low foliage across North American woodlands, blending seamlessly against dry leaves with their mottled brown and tan camouflage. Unlike web-weaving spiders, these robust ambushers rely on patience and oversized, spiny front legs to snatch passing prey in a sudden grip. During mating, cautious males tether larger females to the substrate with silk threads to prevent courtship cannibalism.
Ambush PredatorCamouflagedGround Dweller
—observations
—countries
—peak records
Not EvaluatedConservation statusIUCN Red List categoriesLCNTVUENCREWEXNot Evaluated — not placed on the risk ladderRed List categories, explained →
Diet & preyFlies, Beetles, Leafhoppers
Predators
- Spider wasps
- Ground-foraging birds
- Small rodents
ThreatsHabitat fragmentation, widespread pesticide use, leaf-litter removal
HabitatsDeciduous forests, grasslands, leaf litter, low understory vegetation
Life span1–2 years
Classification
- OrderAraneae
- FamilyThomisidae
- GenusXysticus
- SpeciesXysticus ferox
Range data is not available yet.
Interaction riskLow
- Low
- Moderate
- High
- Very high
- Why interaction risk is low
- Harmless to humans and pets; safe to observe at close range.
Responsible observation
- Searching: Gently brush aside decaying autumn leaves in moist woods to uncover resting adults.
- Observing: Watch for its crab-like sideways scuttle when nudged or coaxed into open view.
Predator (c) Andrea Gobetti, some rights reserved (CC BY) · cc-by
Close Relative Nick Block / CC BY 4.0 · cc-by
Family Relative (c) Wolfgang Jauch, some rights reserved (CC BY), uploaded by Wolfgang Jauch · cc-by
Family Relative (c) Douglas Goldman, some rights reserved (CC BY-SA), uploaded by Douglas Goldman · cc-by-sa
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