Neriene litigiosa
09/25/2010 Heart O' the Hills Area, Olympic National Park, Washington
08/13/2011 Heart O' the Hills Area, Olympic National Park, Washington
09/17/2010 Heart O' the Hills Area, Olympic National Park, Washington
09/17/2010 Heart O' the Hills Area, Olympic National Park, Washington
08/20/2020 Heart O' the Hills Area, Olympic National Park, Washington
09/04/2023 Heart O' the Hills Area, Olympic National Park, Washington
08/13/2011 Heart O' the Hills Area, Olympic National Park, Washington
08/13/2011 Heart O' the Hills Area, Olympic National Park, Washington
08/13/2011 Heart O' the Hills Area, Olympic National Park, Washington
08/15/2011 Heart O' the Hills Area, Olympic National Park, Washington
08/15/2011 Heart O' the Hills Area, Olympic National Park, Washington
08/08/2020 Heart O' the Hills Area, Olympic National Park, Washington
08/14/2020 Heart O' the Hills Area, Olympic National Park, Washington
08/14/2020 Heart O' the Hills Area, Olympic National Park, Washington
Sierra Dome Spiders, Neriene litigiosa, build sheet webs more or less in the shape of a dome with an internal flat platform. The female, about 7 mm long (excluding the legs), hangs upside down in the web waiting for prey. The silk in these webs is so fine that they’re nearly invisible except when covered with dew.
In some circumstances—for example in low or widespread populations—females deposit a pheremone on their webs to attract males. A male may remove the pheremone-scented silk after mating to prevent other males from being attracted. See “The Case of the Missing Perfume” on The Animal Communication Project
Sierra Dome Spiders on bugguide.net