Common hammock-weaver
Linyphia triangularis
The common hammock-weaver is a very widespread member of the Linyphiidae family in Central Europe. It reaches a body length of up to 7 mm and is characterized by a dark, fork-shaped mark on the light cephalothorax. Its typical web consists of a horizontal sheet (the hammock) and vertical barrier threads above it, designed to intercept flying insects.
Details
Identification
Dark fork-shaped mark on the prosoma, serrated dark longitudinal band on the opisthosoma, long legs with spines.
Social behavior
Solitary; during the mating season, males often live in the female's web for several days and defend it against competitors.
Diet
Feeds on small to medium-sized flying insects such as midges, flies, and aphids.
Hunting strategy
Ambush predator in a sheet web; prey hits barrier threads, falls onto the hammock, and is bitten by the spider from below through the silk.
Spawning substrate
Plant stems, the underside of leaves, or bark crevices for cocoon deposition.
Overwintering
Overwintering usually occurs in the egg stage within cocoons that are placed securely in the vegetation.
Ecology
Ecological role
Important regulator of insect populations in bushes and forest edges.
Natural predators
Insectivorous birds, parasitic wasps, predatory bugs, and larger spider species.
Competitor species
Other species of the Linyphiidae family and smaller orb-weaving spiders.
Ecosystem service
Contributes to biological pest control, particularly by consuming aphids.
Threats
Use of broad-spectrum insecticides in agriculture and loss of hedgerow structures.
Scientific profile
Profile
Distinguishing features
Characteristic 'tuning fork' pattern on the prosoma. Males possess conspicuously elongated and diverging chelicerae used during mating. The legs are long and covered with fine spines.
Habitat
Highly euryoecious; inhabits forest edges, hedges, shrubs, gardens, and tall herb communities. Prefers the herb and shrub layer up to about 2 meters in height.
Role in food web
Important predator of small insects in the shrub layer; serves as food for songbirds, parasitic wasps, and larger spiders.
Protection & threats
Main threats
Currently not threatened; potential local threats include intensive hedge management or large-scale pesticide use in agriculture.
Population trend
Stable; one of the most common sheet-web spiders in Central Europe.