Insect · GBIF taxon 1095740
Black Spider Beetle
Mezium americanumAlso known as American Spider Beetle, Shiny Spider Beetle
Black spider beetles look remarkably like tiny, shiny amber or dark mahogany beads perched on slender, hairy legs. These slow-moving scavengers inhabit pantries, granaries, bird nests, and museums, where they feed on a vast array of dried organic matter ranging from grain and seeds to feathers. When startled, adults frequently tuck in their limbs and feign death until danger passes.
NocturnalScavengerTiny
Licensed reference(c) K. Walker, Museum Victoria, some rights reserved (CC BY) · cc-by
—observations
—countries
—peak records
Not EvaluatedConservation statusIUCN Red List categoriesLCNTVUENCREWEXNot Evaluated — not placed on the risk ladderRed List categories, explained →
Diet & prey
- Dried Grain
- Spices
- Organic Debris
Predators
- Spiders
- Centipedes
- Predatory Mites
ThreatsPest control efforts and sanitation practices in human dwellings.
HabitatsPantries, granaries, flour mills, museums, bird nests, and animal burrows.
Life span1–2 years
Size / weightNot available
Classification
- OrderColeoptera
- FamilyPtinidae
- GenusMezium
- SpeciesMezium americanum
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.
Responsible observation
- Pantry Spotting: Search in dark, quiet corners of cupboards or near dried goods for tiny crawling beads.
- Observe Defense: Tap nearby surfaces gently to watch the beetle freeze or feign death.
Close Relative (c) Paul Roots, some rights reserved (CC BY), uploaded by Paul Roots · cc-by
Image unavailableClose Relative 
Close Relative (c) Janet Graham, some rights reserved (CC BY) · cc-by
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