Harvestman (Leiobunum limbatum)
Leiobunum limbatum
The Buntkanker is a striking harvestman known for its extremely long, slender legs and high-contrast body markings. Originally native to the Alpine regions, it has expanded its range across much of Central Europe, frequently inhabiting moist rock faces, forests, and increasingly human structures like house walls. Females exhibit a characteristic dark saddle pattern on the abdomen, whereas males tend to be more uniformly colored. This species is primarily crepuscular and nocturnal, often spending daylight hours in large resting aggregations in sheltered locations.
Details
Identification
Extremely long legs, smooth eye mound (ocularium), females with dark saddle markings, males often reddish-brown.
Social behavior
Often forms dense aggregations (resting groups) with conspecifics in sheltered locations during the day.
Diet
Omnivorous generalist; feeds on small insects, mites, dead arthropods, as well as plant material and fungi.
Hunting strategy
Active searching and grasping of prey using the pedipalps; does not build webs.
Spawning substrate
Moist soil, moss, or crevices in rocks and masonry.
Overwintering
Overwintering typically occurs in the egg stage within the soil or moss.
Ecology
Ecological role
Important predator of small invertebrates and recycler of organic detritus within the ecosystem.
Natural predators
Insectivorous birds, reptiles, amphibians, and larger araneid spiders.
Competitor species
Other harvestman species such as Phalangium opilio or invasive Leiobunum species.
Ecosystem service
Contributes to biological pest control by consuming small insects and mites.
Threats
Use of broad-spectrum insecticides, loss of moist microhabitats due to land sealing.
Scientific profile
Profile
Distinguishing features
Extremely long legs (span up to 20 cm); males with characteristic brick-red coloration; ocularium small, high, and unarmed (smooth); femora of the legs finely spined; females with a light area in front of the ocularium containing dark spots.
Habitat
Originally associated with rock faces and moist mountain forests (up to 2000 m); today strongly synanthropic on walls, buildings, and in gardens.
Role in food web
Generalist predator and decomposer; regulates populations of small arthropods and serves as an important food source for birds and larger spiders.
Protection & threats
Main threats
No acute threats known; the species is widespread in Central Europe and partially benefits from human settlement structures.
Population trend
Stable; classified as 'Least Concern' in Germany (Rote Liste Zentrum).