Arachnid
Swift Crab Spider
Mecaphesa celerSwift crab spiders are ambush hunters that sit motionless on flower blossoms or foliage, waiting with outstretched forelegs to grab visiting pollinators. They do not spin capture webs, relying instead on keen eyesight, tactile bristly hairs, and remarkable camouflage that blends with petals and leaves. Males are notably smaller and darker than females, actively patrolling plants during the mating season while evading predatory threats.
Ambush HunterFlower DwellerDimorphic
—observations
—countries
—peak records
Not EvaluatedConservation statusIUCN Red List categoriesLCNTVUENCREWEXNot Evaluated — not placed on the risk ladderRed List categories, explained →
Diet & preyHoneybees, Hoverflies, Small butterflies
Predators
- Spider wasps
- Songbirds
- Larger spiders
ThreatsWidespread pesticide application and loss of diverse floral habitats
HabitatsMeadows, open fields, gardens, prairies, and scrublands
Life spanAround 1 year
Classification
- OrderAraneae
- FamilyThomisidae
- GenusMecaphesa
- SpeciesMecaphesa celer
Range data is not available yet.
Interaction riskLow
- Low
- Moderate
- High
- Very high
- Why interaction risk is low
- Safe to observe at a normal distance; bites are rare and harmless to humans.
Responsible observation
- Flower Inspections: Check the centers of bright yellow and white blooms where females frequently conceal themselves.
- Macro Photography: Approach slowly with a macro lens; they often hold their ground or scuttle backwards like a crab rather than fleeing.
Prey Andreas Trepte / CC BY-SA 2.5 · cc-by-sa
Predator (c) Nathan Odgers, some rights reserved (CC BY) · cc-by
Same Family (c) Wolfgang Jauch, some rights reserved (CC BY), uploaded by Wolfgang Jauch · cc-by
Same Family (c) Douglas Goldman, some rights reserved (CC BY-SA), uploaded by Douglas Goldman · cc-by-sa
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