Agelenids build a sheet-like web expanding from tubular retreat in a crevice, rolled leave or rodent burrow. The spiders generally walk upright over the surface of the web.
The silk is very fine but not especially strong or flexible and is not sticky. Insects may jump, fall or are tripped down on to the surface of the web, which they can only navigate with difficulty and is difficult to jump from. The prey is located vibrations and tugs and the spiders rush out, simply grabbing smaller insect or giving larger insects several short nips.
Several interesting adaptations. For instance, the venom of Agelenopsis aperta may have toxins that promote autotomy.
Are generally considered to be non-hazardous though some bites may be painful and one, Tegenaria agrestis, has been accused of causing necrotic lesions.
The venom of Agelenopsis aperta was studied intensively in the 1980's, resulting in the discovery of several useful toxins but little has been done since.
Species
Agelenopsis aperta
Hololena spp.
Calilena spp.
Tegenaria domestica
Toxins