Long-jawed Orb Weavers
( Tetragnathidae )


2008-0622-01100112-ARA01442-Tetragnathidae[1543h19s,F,A,plant-stem]{EXD}-G.jpg

PHOTO COMMENT

IDENTIFICATION
Identification:Tetragnathidae
(George and Elizabeth Peckham ,1866 )
Common Name:Long-jawed Orb Weavers
Life Stage:(A) adult

PHYLOGENY

Phylum:Arthropoda
Class:Arachnida
Order:Araneae
Family:Tetragnathidae
Taxon Code:ARA01442
ITIS/TSN:82732

LOCATION DETAILS
Location Name
Gardens at Lake Merritt, Lakeside Park, 666 Bellevue, Oakland
County:Alameda County
ECI Site#:CA01100110

RECOGNITION
Description
They vary in appearance, but those most commonly found are long-legged, thin-bodied spiders. When at rest, they may cling lengthwise along a twig or blade of grass, holding on with the short third pair of legs. The long pairs of legs are extended.

BIOLOGY
Food
Mainly insects.
Habitat
Members of the genus Tetragnatha typically live in meadows near water, and around the banks of waterways (rivers, lakes, swamps), usually on low-hanging branches and reeds.
Nesting Preferences
The Web: The long-jawed orb-weaver webs are orb-shaped (concentric circles, with 12-20 spokes radiating from the center to anchor points (such as tree branches)). The angle of the web is typically somewhere between vertical and horizontal.
Importance
These spiders will bite if threatened, but the bite is not harmful to people. It is recommended that they not be picked up, but rather observed in their natural environment (e.g. - on their web).
Range
Throughout the United States and Southern Canada.

CREDITS
Photographer
Eddie Dunbar
Insect Sciences Museum of California

References
ITIS.


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