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Argiope trifasciata (Forskål, 1775)

banded garden spider


Females

Immatures or Unknown Sex

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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


Males
Male dimensions A = 2.25 mm 
B = 2.81 mm 
C = 1.88 mm 
Females
Male dimensions A = 4.43 mm 
B = 8.86 mm 
C = 1.88 mm 

Distinguishing Characteristics

This species can be distinguished from other members of the same genus by its whitish abdomen with numerous, transverse and thin black lines.

Range

Southern British Columbia to Nova Scotia, south to Chile.

Collection Map of Museum Specimens
in The Nearctic Spider Database

Museum Specimens in The Nearctic Spider Database

Typical Habitats

The web is made in weeds and tall grasses in fields and meadows.

Activity Patterns

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.

Prey

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).

Extra Reading

Horton, C. C. 1979. Apparent attraction of moths by the webs of araneid spiders. Journal of Arachnology 7: 88. PDF

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)


Recent Submissions

Argiope trifasciata (Bev Wigney [August 11, 2006])Observation Date: August 11, 2006 Coordinates: 45.1465, -75.6088 Observer: Bev Wigney
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

Argiope trifasciata (Bev Wigney [August 2, 2006])Observation Date: August 2, 2006 Coordinates: 45.1465, -75.6088 Observer: Bev Wigney
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