Argiope trifasciata (Forskål, 1775)
banded garden spider
Immatures or Unknown Sex
How to Identify Argiope trifasciata (Forskål, 1775)
Family: ARANEIDAE Simon, 1895
Genus: Argiope Audouin, 1826
Species: Argiope trifasciata (Forskål, 1775)
Origin of Name: Argiope is derived from Greek, meaning "with bright face or with bright eye" and trifasciata is Latin for "three bands".
Official Common Name: banded garden spider
This species can be distinguished from other members of the same genus by its whitish abdomen with numerous, transverse and thin black lines.
Southern British Columbia to Nova Scotia, south to Chile.
Collection Map of Museum Specimens
in The Nearctic Spider Database
The web is made in weeds and tall grasses in fields and meadows.
Males mature late July to mid-September and females mature late August to autumn frosts. After the first frosts, eggs are deposited in brown, hemispherical cocoons and are attached to the lower parts of shrubs and herbs.
It has been thought that the web is attractive to adult males of the northern buckmoth (Horton, 1979). Like most spiders, this species is a generalist predator. Others have noted aggregations of A. trifasciata with high prey density (Olive, 1982).
Olive, C. W. 1982. Behavioral response of a sit-and-wait predator to spatial variation in foraging gain. Ecology 63: 912-920.
Other Web Pages
Arthropods of Orange County, California: Banded argiope (http://mamba.bio.uci.edu/~pjbryant/biodiv/spiders/Argiope%20trifasciata.htm)
The Nearctic Spider Database (http://canadianarachnology.dyndns.org/data/spiders/15415)
Observation: Sighting Report - Concentration of immature female & male Argiope trifasciata spiders: -- Location: City of Ottawa (formerly Osgoode Township), Carleton County, Ontario, Canada., Coordinates: Osgoode 45.14651, -75.60883., Date & Time: August 11, 2006; 15:40 hours., Habitat: Oldfield meadow -- Intentionally created Spider Habitat. Predominant vegetation: goldenrod, Wild cucumber, common milkweed, yarrow, Aster., Details: Seven A. trifasciata found on orbs in less than a square meter, suspended from goldenrod. Two immature females had parallel orbs almost on top of each other (see photo). Another immature female's orb had two males on fragile webbing to the side and below. Nearby was another larger female with a male in the corner of her web. And one more immature female alone on an orb. General vicinity of UTM 18T 0453821, 5003433 (WGS84)., Reference Photographs: (2) posted at following URLs: http://www.pbase.com/crocodile/image/65066947, http://www.pbase.com/image/65066948
Observation: Sighting Report - immature female Argiope trifasciata: -- Location: City of Ottawa (formerly Osgoode Township), Carleton County, Ontario, Canada., Coordinates: Osgoode 45.14651, -75.60883., Date & Time: August 2, 2006; 11:00 hours., Habitat: Oldfield meadow -- Intentionally created Spider Habitat. Predominant vegetation: goldenrod, Wild cucumber, common milkweed, yarrow, Aster., Details: one spider found on orb in "Spider Garden". General vicinity of UTM 18T 0453821, 5003433 (WGS84)., Reference Photograph: (1) posted at following URL: http://www.pbase.com/image/64796918