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Giant Wood Spider (Nephila pilipes)

Meet the Nephila Pilipes! This golden orb-weaver spider calls many places home, from Asian countries like China and India to faraway Australia. It’s one of the biggest orb-weaving spiders out there. Stick around to learn cool things about this big spider!

Table Of Content hide

Physical Description and Identification

Are Giant Wood Spiders Venomous?

Can Giant Wood Spiders Bite?

Ecological Importance and Behavior of Giant Wood Spider

Quick Facts

Did You Know

Physical Description and Identification

Adults

Size: Sexual dimorphism is seen when it comes to size as the females are excessively large (30 mm to 50 mm), and the males are considerably small (5mm to 6mm). The reason for the large size of the female Nephila Pilipes is that even after attaining maturity, molting continues.
Color: Male– Light brown or red; Female-Yellow; Both sexes have black legs with yellow bands, prominent near the area of their joint.
Other Characteristic Features: They have a cylindrical-shaped elongated body alongside long legs. The abdomens of the female have the appearance of a globe when the eggs are inside.

Eggs

The eggs are contained in a sac which is kept in a pit covered with soil or leaves, instead of being placed in the web. A particular sac contains about 2000 eggs.

Spiderlings

When they are juveniles, their legs (first, second, fourth pairs) are hairy which disappears on maturation.

The Web

These spiders produce golden silk for weaving their web, which is vertical with an irregular mesh, having a height and width of 6mm and 2mm respectively. They do not dismantle their webs often and it can last for a couple of years.

Are Giant Wood Spiders Venomous?

Yes, Giant Wood Spiders have venom. They use it mainly for catching their prey. However, their venom isn’t usually harmful to humans.

Can Giant Wood Spiders Bite?

Giant Wood Spiders can bite if they feel cornered or threatened. The bite might sting a bit, but it’s typically not a big concern for most people.

Ecological Importance and Behavior of Giant Wood Spider

Nephila Pilipes plays a pivotal role in maintaining ecological balance. They are proficient hunters, primarily preying on small insects, which helps in controlling the population of these pests in their habitat. The females exhibit maternal instincts, meticulously guarding their egg sacs until the spiderlings are ready to venture out.

Natural Predator: Birds, wasps, and damselflies stand as the common predators of the Nephila Pilipes. These predators pose a constant threat, particularly to the young spiderlings and juveniles, necessitating constant vigilance and agility from the spiders to ensure their survival.

Prey-Predator Dynamics: The relationship between the giant wood spider and its predators is a complex dance of survival. The spider’s web not only serves as a trap for its prey but also acts as a line of defense against its predators. The Nephila Pilipes must constantly balance its role as a predator with its vulnerability as prey, showcasing the intricate intricacies of nature’s food web.

Relationship with Humans: Humans share a unique relationship with the Nephila Pilipes. While some may view them as pests, others appreciate their role in pest control and their contribution to biodiversity. In some regions, such as Vietnam’s Bình Thuận Province, they even find their way into local cuisine, where the Raglai people are known to roast and consume them.

Quick Facts

Other Names	Nephila Maculata (as called before)
Lifespan	Approximately 12 months
Distribution	Japan, Vietnam, Singapore, Taiwan, China, Malaysia, Laos, Cambodia, Thailand, India, Sri Lanka, Myanmar, Nepal, India, Australia, Papua New Guinea
Habitat	Primary as well as secondary forests, gardens, and wasteland
Common Predators	Birds, wasps, damselflies
Diet	Small flies, beetles, locusts, larger cicadas

Did You Know

It has nine subspecies, some of them being N. p. hasselti (found in Java), N. p. lauterbachi (in New Guinea) and N. p. annulipes (in Indonesia).
They are roasted and eaten as food by the Raglai people of Vietnam’s Bình Thuận Province.

In summary, from its unique physical characteristics to its role in the ecosystem, every aspect of this spider’s existence speaks volumes about the complexity and beauty of the natural world

Frequently Asked Questions

How big do female giant wood spiders get?

Female giant wood spiders get exceptionally large, with a body length ranging from 30 to 50 millimeters. This significant size is attributed to the fact that they continue to molt and grow even after reaching sexual maturity. In contrast, males are considerably smaller, measuring only 5 to 6 millimeters.

What does a giant wood spider look like?

A giant wood spider has an elongated, cylindrical body and long legs. Females are typically yellow, while males are reddish-brown. A key identifying feature for both sexes is their black legs, which have prominent yellow bands at the joints. Gravid females have abdomens that appear globe-like.

Is the giant wood spider venomous to humans?

Yes, the giant wood spider is venomous, but its venom is not considered medically significant to humans. The venom is primarily used to immobilize insect prey caught in its web. A bite to a person may cause minor localized pain and redness but is not typically a major concern.

Where do giant wood spiders lay their eggs?

Giant wood spiders do not place their eggs in their web. Instead, the female creates an egg sac and deposits it in a pit she digs in the ground. This pit is then carefully covered with soil or leaves for protection. A single egg sac can contain approximately 2,000 eggs.

Why are male giant wood spiders so much smaller than females?

Male giant wood spiders are smaller due to extreme sexual dimorphism, a common trait in this species. Females reach 30-50mm because they continue molting after maturity, while males stop growing at a much smaller size of 5-6mm. This size difference is linked to their reproductive strategies.

What happens if a giant wood spider bites you?

If a giant wood spider bites you, the effects are generally mild and not a cause for alarm. The bite is not considered dangerous to humans and typically results in minor, localized pain similar to a sting, along with some possible redness. These spiders only bite defensively when provoked.

How long does a giant wood spider’s web last?

A giant wood spider’s web is remarkably durable and can last for a very long time. Unlike many other spiders that frequently dismantle and rebuild their webs, the Nephila pilipes often maintains the same web for extended periods, sometimes for a couple of years, only making necessary repairs.

Giant Wood Spider (Nephila pilipes)