Arachnid · GBIF taxon 4336780
Balaustium murorum
Balaustium murorumAlso known as Concrete Mite, Sidewalk Mite
Sidewalk mites are tiny, intensely bright red arachnids that emerge in vast numbers during warm spring days to scurry across concrete walls and paved surfaces. Unlike many of their predatory relatives, these mites feed primarily on pollen grains accumulated on sun-warmed rocks and urban structures. They move with remarkable speed in chaotic, searching paths before retreating into deep masonry cracks as temperatures rise.
TinyBright RedSun-Loving
1 / 3—observations
—countries
—peak records
Not EvaluatedConservation statusIUCN Red List categoriesLCNTVUENCREWEXNot Evaluated — not placed on the risk ladderRed List categories, explained →
Diet & prey
- Pollen
- Aphid eggs
- Springtails
Predators
- Predatory mites
- Spiders
- Ants
ThreatsChemical insecticides, extreme heat, heavy downpours
HabitatsConcrete structures, stone walls, patios, garden soil
Life span1–2 months
Classification
- OrderTrombidiformes
- FamilyErythraeidae
- GenusBalaustium
- SpeciesBalaustium murorum
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
- Look on Masonry: Search sunlit concrete walls, patio pavers, and stone steps on warm spring mornings.
- Avoid Crushing: Handle gently or observe without touching to prevent red staining on clothing or stone.
- Use a Magnifier: Observe with a macro lens or hand lens to spot their velvety hairy coat.
Look-Alike Lukas Jonaitis from Vilnius, Lithuania / CC BY 2.0 · cc-by
Competitor (c) Raquel Baranow, some rights reserved (CC BY) · cc-by
Distant Relative (c) grampianshiker, some rights reserved (CC BY) · cc-by
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