GoldenSilkOrbWeaver

Banana Spider AKA Golden Silk Orbweaver

The Golden Silk Orbweaver (Nephila clavipes) also known as the Banana Spider is one of the largest non-tarantula spiders in North America. It is the only species of its genus that lives in the western hemisphere and is found in Florida, across the gulf, up to North Carolina, and other southern countries in South America.

Golden Silk Orbweaver webs can measure over 3 feet in diameter and are normally created in forest clearings and can often stretch across trails. The webs trap prey, and their primary diet of this orb weaver consists of a variety of insects.

Females can reach up to an inch to an inch and a half. Their body is orange and brown with black feathery turfs on their legs. Males are distinctly different from females, they are much smaller at around a quarter of an inch in diameter, and their body is brown. Males are seen from July to September waiting for females to mature around August for a chance to mate with them. Males can be seen sitting around the female until she is ready to mate, and multiple males can occupy one web. They will fight each other to have a chance to mate with some even losing legs. Females will produce at least two egg sacks after mating. Each sack can contain hundred of eggs! The sacks can measure about a tenth of an inch and are covered in thick golden silk.

Despite their impressive size and bright color, they are not dangerous to humans. Golden Silk Orbweavers are not venomous and will only bite if they are being held. Banana Spiders can be observed year-round in Florida, though autumn is the best time to view them. If you spot them, remember to keep a safe distance and never intentionally disturb their webs. Spiders of all shapes and sizes play an important ecological role in Florida’s natural and developed areas.

Photo Credit: Andy Waldo

Author: Destiny Alvarez – Fisheries and Wildlife Sciences, University of Oregon

The Golden Silk Orb-Weaver (Trichonephila clavipes) is dreaded by hikers and bikers in the forest. Their sticky, golden webs, which can measure 6 1/2 feet in diameter, are spun in insect flight paths in open woods and at the edge of dense forests. You may run into them in your yard, where they are spun between trees and dense shrubs. The large webs catch flies, bees, wasps, moths, butterflies, male orb-weavers, and more. The prey is devoured by the spider, who is waiting patiently on the web.

Golden Silk Orb-Weavers are also known as Banana Spiders because of their yellow coloring. Their color variation, complete with furry-looking tufts on their legs, helps them blend into the forest. They are also known as Giant Wood Spiders because the females’ bodies are more than 1 1/2 inches and, including legs, can measure up to 5 inches in diameter. Males are significantly smaller, with bodies at about 1/4 of an inch.

The small males come out to mate between July and September. The females produce at least two egg sacs per year but have been known to produce up to nine. Each sac contains a few hundred eggs. The female often eats the male after mating.

Climate change has mildly affected these spiders’ behavior. Still, they have adapted by creating reflective carapaces and turning the cylindrical parts of their bodies towards the sun to reduce the heated body surface. They also reduce heat by holding a drop of water in their chelicerae (mouth-part) and allowing it to evaporate. This has allowed them to adapt very well to their environment.

The next time these little ones give you a scare, take a few minutes to appreciate their hard work. Golden Silk Orb-Weavers play an important role in our ecosystems. Orange and pecan farmers appreciate their cooperation in keeping pests away from harvests. These fascinating spiders provide insect control in our wild spaces and our yards.

Banana Spider

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