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Orb-weaver spiders are members of the spider family Araneidae. They are the most common group of builders of spiral wheel-shaped webs often found in gardens, fields, and forests. The English word "orb" can mean "circular", [ 1 ] hence the English name of the group.
Nephila spiders produce large asymmetric orb webs up to 1.5 m (5 ft) in diameter. [citation needed] Nephila species remain in their webs permanently, so have a higher predation risk. The golden silk orb-weaver is named for the yellow color of the spider silk used to construct these webs. Yellow threads of their web shine like gold in sunlight.
Like most orb-weavers, the species displays marked sexual dimorphism in both size and color pattern. T. clavipes females are some of the largest non-tarantula spiders in North America, ranging from 24 mm to 40 mm in length when fully developed. It is possible that they are even the largest orb-weaver species indigenous to the United States.
Nephila pilipes (northern golden orb weaver or giant golden orb weaver [2]) is a species of golden orb-web spider. It resides all over countries in East and Southeast Asia as well as Oceania. It is commonly found in primary and secondary forests and gardens. Females are large and grow to a body size of 30–50 mm (overall size up to 20 cm ...
It is referred to by the common name Australian golden orb weaver. [4] It is found in Indonesia from Java eastwards, Papua New Guinea, Australia, northern New Zealand, and New Caledonia. [2] It has a large body size variability, females can reach a body length of up to 40 millimetres, males about 7 mm.
Darwin's bark spider (Caerostris darwini) is an orb-weaver spider that produces the largest known orb webs, ranging from 900 to 28,000 square centimetres (140 to 4,340 sq in), [2] [3] with bridge lines spanning up to 25 metres (82 ft).
The orb part of the web may be nearly 2 feet (0.61 m) in diameter. [5] The eggsac consists of fluffy yellow threads in a rolled leaf over a lenticular or spherical egg mass 5–12 mm (0.20–0.47 in) in diameter, which may contain up to 1,000 eggs.
Neoscona species are among the most common and abundant orb weavers and are found on all continents. [3] Females range in size from 5–7 mm (0.20–0.28 in) and males 5–6 mm (0.20–0.24 in). [2] Females build a vertical web measuring 15–45 cm (5.9–17.7 in) in diameter, with 18-20 radii.