Poecilotheria metallica

This spider has bright blue hair.

It lives in trees in India. It makes webs in holes. These webs look like funnels.

The spider eats flying bugs. It likes to hide from light. It can move very fast.

Female spiders live a long time. They can live for 12 years. Males do not live as long.

This spider is hard to find in the wild. We must help protect its home.

The peacock tarantula is a special spider. It has bright blue hair.

This spider lives in India. It stays in forests with many trees. It lives in holes in tall trees. There, it makes funnel webs. These webs are not even on both sides. The spider eats flying insects like moths. It is a skittish spider. It likes to run away from light.

The blue color is very pretty. It comes from tiny parts on the hair. These parts are called nanostructures. They change color when you look from different angles. This is called iridescence. Young spiders are not as blue. They turn blue as they grow up.

Females live a long time. They can live up to 15 years. Males live for only 3 to 4 years.

This spider is in trouble. It is called Critically Endangered. This means it might disappear soon. People are cutting down the trees where it lives. People also take them to sell as pets. We must help protect their forest homes.

The peacock tarantula is a very special spider. It is also called the Gooty sapphire tarantula.

This spider is the only blue one in its group. It has bright blue hair and pretty patterns on its body. These patterns look like shapes that repeat themselves. This spider is important because it is very rare. It is listed as Critically Endangered by the IUCN. This means it faces a big risk of disappearing forever.

This spider has a very interesting way of being blue. Its color comes from tiny structures on its hairs. These are called nanostructures. They are so small you cannot see them easily. Because of these structures, the color can change when you look from different angles. This is called iridescence.

Young spiders do not show as much blue color. They become more blue as they grow up. Adult males are usually less blue than females. Males also have longer legs and thinner bodies.

People first learned about this spider a long time ago. In 1898, a man named H.C. West found a female specimen. He was a chief engineer for the Madras Railway. He found the spider near the town of Gooty in India. He sent the spider to the British Museum.

A scientist named Reginald Innes Pocock studied it in 1899. He saw the unique blue color. He decided it was a new species. He gave it the name Poecilotheria metallica.

In the wild, these spiders live in southern India. They live in the deciduous forests of Andhra Pradesh.

They like to live in holes in tall trees. They are arboreal, which means they live in trees. There, they build funnel-shaped webs to catch flying insects. They might eat moths, grasshoppers, or cockroaches. They are very skittish and like to run away. They also try to hide when bright light shines on them.

These spiders are also kept as pets by many people. They have been bred in homes for over ten years.

Females live a long time, sometimes up to 15 years. Males live much shorter lives of only 3 to 4 years. Even though they are pretty, their bite can be serious. Their venom can cause pain, sweating, or headaches. Most bites are "dry bites" where no venom is used. However, their fangs can grow nearly 3/4 of an inch long.

The peacock tarantula, scientifically known as *Poecilotheria metallica*, is a remarkable species of Old World spider. It is most famous for its vivid blue coloration, which makes it unique within its genus. Other spiders in the *Poecilotheria* group have complex patterns, but only *P. metallica* is covered in blue hair. This spider is much more than just a beautiful insect; it is a vital part of its specific ecosystem in India. However, it is also a species facing extreme danger in the wild. The International Union for Conservation of Nature (IUCN) has classified it as Critically Endangered.

The spider's striking blue color is not created by simple pigments like paint. Instead, the color comes from quasi-periodic perforated multilayer nanostructures on its hairs. These are tiny, physical structures that interact with light. This process creates structural colors, which are often highly iridescent. Iridescence means the color appears to change when you view it from different angles. Scientists believe these bright colors might help the spiders choose mates or compete for them. This is because many tarantulas possess opsins, which are proteins that allow for color vision.

There are distinct physical differences between the males and females of this species. As the spiders mature, their blue coloring becomes much more intense. Young spiders are less chromatic, meaning they show less of this bright color. In mature males, the blue is actually less prominent than in females. Males also possess more slender bodies and longer legs. A key way to identify a mature male is the presence of emboli. These are specialized structures found at the end of their pedipalps, which appear after their final mature molt.

The history of this species began in the late 19th century. In 1898, a chief engineer named H.C. West discovered a female specimen near the Indian town of Gooty. He found the spider in his bungalow along the north-west line of the Madras Railway. West sent this specimen to the British Museum for study. In 1899, the British zoologist Reginald Innes Pocock examined the spider. He noted its unique and distinct coloration. Because it was unlike any known spider, he named it *Poecilotheria metallica*.

In their natural habitat, these spiders are arboreal, meaning they live in trees. They are found in the deciduous forests of Andhra Pradesh in central southern India.

They typically inhabit holes in tall trees where they build asymmetric funnel webs. These webs help them catch their primary prey, which consists of various flying insects. While they usually live alone, they may live communally if the number of available tree holes is limited. The spiders are also highly photosensitive, which means they react strongly to light. They are skittish creatures that prefer to flee rather than fight.

While beautiful, *P. metallica* has a medically significant bite. Their fangs are quite large, reaching nearly 3/4 of an inch in length. If a spider chooses to bite rather than flee, it may inject venom. This venom can cause intense pain, sweating, headaches, cramping, or swelling. It can also cause a person's heart rate to increase. Fortunately, most encounters result in "dry bites," where the spider does not actually inject any venom. The effects of a venomous bite can last for up to one week. Despite this, there have never been any recorded human deaths from their bites.

The lifespan of these spiders depends heavily on their sex. Females are much longer-lived, typically surviving between 11 and 12 years, though some reach 15 years. Males have a much shorter life cycle, living only 3 to 4 years. This difference in longevity also affects their value in the pet trade. Because they are hardy and grow relatively fast, they are popular with enthusiasts. In the United States, they can be quite expensive, sometimes priced above $500.

Conservation is a major concern for the survival of the peacock tarantula. Their natural range is extremely small, covering an area of less than 100 square kilometers. This habitat is being rapidly destroyed by logging and the harvesting of firewood. The species is also threatened by collection for the pet trade. While sightings in the Eastern Ghats of Tamil Nadu have extended their known range, the population trend is declining. Because their exact population size is unknown, scientists are working hard to understand how to protect them.