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Juveniles are frequently preyed upon by mud daubers. 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. The orb part of the web may be nearly 2 feet (0.61 m) in diameter. Orb weavers spin their masterpiece of a web and then sit in the middle of the web or nearby. This species is most conspicuous in late summer and early fall. The orb weaver spider is one of the largest families of spiders with over 2,800 distinct species. The orb-shaped web is very large and is often constructed on buildings and other man-made structures, often several feet above ground, especially near outdoor lights. This species is relatively variable in color and sometimes pattern, but is most commonly seen sporting a rusty-red or golden orange color. The undersurface of the abdomen is black, with two white spots. The legs display alternating light and dark brown bands. The upper surface of the abdomen is brown and hairy. Females are about 9.5–19 millimeters (0.37–0.75 in) long, while males are somewhat smaller. Generally nocturnal, females may become diurnal in the fall. The name "barn spider" is also commonly used for a different spider, Araneus cavaticus. Its common names include Hentz orbweaver (after Nicholas Marcellus Hentz), spotted orbweaver, and barn spider. It is found in the United States from Maine to Florida in the east, to Minnesota in the Midwest, to Arizona in the southwest, southern California coastal communities and in Mexico. Females may also be distinguished by a needle-like epigynum protruding in the direction of the spinnerets.Neoscona crucifera is an orb-weaver spider in the family Araneidae. The female is larger than the male, having a body length of 20 – 25 mm compared with 15 – 17 mm for the males. Their bite is not dangerous to humans but may induce mild, local pain, redness, and occasionally swelling for a period of 30 minutes up to three to four hours. Occasionally individual spiders will remain on the web during the day, possibly when prey has not been caught for a while, but this makes them more vulnerable to predation by birds. These are the onsets of muscles that flatten the abdomen. Its color ranges from red brown and grey brown to black with a dark, yellowish to yellow-greenish leaf-like fleckled marking on its opisthosoma, where small dents are visible. When disturbed they will retreat towards this rest area, although under imminent danger the spider will drop to the ground and "play dead". The walnut orb-weaver spider is very wide and flattened, with a leathery skin. They are commonly found around human habitation so may be found resting under leaves and in similar places. During the day the spider will often rest somewhere near the web, usually under a leaf or twig, or in a crevice in bark or rock. They make their sticky rounded orb webs near lights and between trees where insects are likely to fly.

They are usually nocturnal feeders, resting head down in their webs waiting to catch flying insects. The spiders are notable for the often large and intricate webs which they weave at night.

They are able to change their colour with each moult to better match the background upon which they rest during the day. The spiders' cephalothoraxes (heads) and proximal (closer to the body) leg segments are usually darker, mostly reddish or reddish brown. There may also be several whitish spots or one or more stripes. They have a roughly leaf-shaped pattern on the top of their abdomen with a complex outline that is darker than the surrounding area. They have very large abdomens when well-fed and exhibit a tremendous colour-range from off-white through tan, brown to almost black. The Australian garden orb weaver spider ( Hortophora transmarina) is a very common species of spider with many variants in size, shape, and colour across the coastal and northern regions of Australia.