Malissia Stetson

Written by Malissia Stetson

Modified & Updated: 16 Jul 2024

Sherman Smith

Reviewed by Sherman Smith


The green-fanged tube web spider, also known as Segestria florentina, is a fascinating creature that arouses both curiosity and intrigue. This spider species, native to Europe and North America, catches attention not only because of its vibrant green fangs but also due to its unique web-building habits and venomous capabilities.

In this article, we will delve into the world of the green-fanged tube web spider, uncovering nine intriguing facts about its behavior, appearance, and ecological significance. From its specialized web structures to its predatory strategies, we will explore the captivating aspects of this enigmatic arachnid.

Whether you have a fear or fascination for spiders, learning about the green-fanged tube web spider will give you a deeper appreciation for the wonders of the animal kingdom.

Key Takeaways:

  • The Green-fanged Tube Web Spider has striking green fangs, hunts at night, and helps keep insect populations in check, making it a fascinating and important part of its ecosystem.
  • These spiders are skilled hunters, have maternal instincts, and play a vital role in maintaining the balance of their habitats, showcasing their unique and intriguing characteristics.
Table of Contents

Unique Green Fangs

The Green-fanged Tube Web Spider, scientifically known as Segestria Florentina, gets its name from its striking feature – its green fangs. Unlike other spiders, which typically have fangs of a different color, this species stands out with its vibrant green fangs, adding to its mysterious allure.

Excellent Hunters

These spiders are highly skilled hunters. They construct their unique tube-shaped webs in dark and hidden corners, such as crevices, caves, and tree bark, where they wait patiently for their prey. Once an unsuspecting insect wanders into their web, the Green-fanged Tube Web Spider swiftly immobilizes it with its venom and devours its meal.

Nocturnal Creatures

The Green-fanged Tube Web Spider is primarily nocturnal, preferring to come out during the night to hunt. They have well-developed night vision, aiding them in their quest for food in low-light conditions. During the day, they retreat into their tube-shaped webs, remaining hidden from potential predators.

Geographic Distribution

These intriguing spiders are native to Europe, particularly found in countries such as Italy, France, Spain, and the United Kingdom. However, they have also been introduced to other parts of the world, including North America, where they have established populations.

Impressive Size

With their body length ranging between 15 to 20 millimeters, the Green-fanged Tube Web Spider is considered a medium-sized species. Their elongated and slender bodies, combined with their distinct green fangs, make them a visually striking presence.

A Venomous Bite

The Green-fanged Tube Web Spider possesses venom that is potent enough to immobilize its prey and also acts as a defense mechanism against potential threats. While their venom is not considered dangerous to humans, their bite may cause mild pain and irritation, similar to a bee sting.

Maternal Care

Unlike many other spider species, the Green-fanged Tube Web Spider exhibits maternal care. After mating, the female lays her eggs and then wraps them in a silky cocoon. She diligently guards the cocoon until the spiderlings hatch, providing them with protection until they are ready to venture out on their own.

Cannibalistic Tendencies

During the mating process, the female Green-fanged Tube Web Spider has been observed to display cannibalistic tendencies, sometimes consuming the male after the mating ritual is complete. This behavior ensures a source of nutrition for the female as she prepares to lay her eggs and care for her offspring.

Ecological Importance

As efficient predators, the Green-fanged Tube Web Spider plays a crucial role in maintaining the balance of ecosystems by regulating insect populations. They help control the numbers of various insects, contributing to the overall health of their habitats.


In conclusion, the green-fanged tube web spider is truly a fascinating creature. Its vivid green fangs and unique web-spinning abilities make it stand out among its arachnid counterparts. From its hunting techniques to its ecological significance, there is so much to admire and learn about this remarkable spider. As researchers continue to study and discover more about this species, we can expect to unravel even more intriguing facts about the green-fanged tube web spider in the future. So, the next time you come across this spider in the wild, take a moment to appreciate its beauty and the vital role it plays in our ecosystem.


Q: Why are the fangs of the green-fanged tube web spider green?

A: The green coloration of the fangs is due to the presence of a unique pigment called biliverdin. This pigment is also found in the blood of certain vertebrate species, giving them a greenish hue.

Q: Are green-fanged tube web spiders venomous?

A: Yes, they are venomous. Although their venom is not considered dangerous to humans, it is potent enough to immobilize and kill their prey.

Q: How do green-fanged tube web spiders catch their prey?

A: These spiders create intricate tube-shaped webs, which they use to capture their prey. They weave sticky silk lines across the opening of the tube and wait patiently for unsuspecting insects to get trapped.

Q: Where can green-fanged tube web spiders be found?

A: Green-fanged tube web spiders are predominantly found in the rainforests of Australia and New Guinea. They tend to inhabit moist environments with dense vegetation.

Q: Do green-fanged tube web spiders pose any threat to humans?

A: While green-fanged tube web spiders are venomous, they are relatively harmless to humans. They are timid creatures and will only bite in self-defense when they feel threatened.

Q: How long do green-fanged tube web spiders live?

A: The lifespan of these spiders can vary, but on average, they live for about two to three years.

Q: Are green-fanged tube web spiders endangered?

A: Currently, there is limited information on the population status of green-fanged tube web spiders. More research is needed to determine if they are facing any conservation concerns.

Q: Can green-fanged tube web spiders be kept as pets?

A: Green-fanged tube web spiders are not commonly kept as pets. Their specific habitat requirements and venomous nature make them more suitable for observation in their natural environments.

Q: How can I differentiate a green-fanged tube web spider from other spiders?

A: The most notable identifying feature of green-fanged tube web spiders is their vibrant green fangs. They also have a slender body shape and are typically larger in size compared to many other spider species.

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