Spiders in Australia: Understanding their Size and Importance

Originally posted on June 15, 2023 @ 12:03 am

Australia is home to a vast range of spider species, including some of the largest in the world. From the venomous Sydney funnel-web spider to the harmless huntsman spider, there is a diverse array of arachnids inhabiting the country. In this discussion, we will explore the size of spiders in Australia and the potential dangers they pose to humans.

The Fascinating World of Australian Spiders

Australia is famous for its unusual fauna, including some of the world’s deadliest spiders. With over 10,000 known species of spiders worldwide, Australia is home to many of them. In fact, it is estimated that there are around 2,400 species of spiders in Australia alone, and they come in a vast range of sizes, shapes, and colors.

The Importance of Spiders in Australia’s Ecosystem

Spiders play a vital role in Australia’s ecosystem. They are predators that keep insect populations under control, and they also serve as food for other animals, including birds, reptiles, and small mammals. Without spiders, the balance of the ecosystem would be severely disrupted.

The Different Types of Spiders in Australia

Australia has some of the most dangerous spiders in the world, including the Sydney funnel-web spider, the redback spider, and the white-tailed spider. However, there are also many harmless spiders that are beneficial to the environment. For example, the golden orb-weaving spider is a common sight in gardens and parks and is known for its striking yellow and black coloration.

Understanding the Size of Spiders in Australia

When it comes to spiders, size matters. In Australia, spiders come in a wide range of sizes, from tiny jumping spiders to massive Huntsman spiders. Understanding the size of spiders is important for identifying and dealing with potential dangers.

Spiders play a vital role in Australia’s ecosystem, keeping insect populations under control and serving as food for other animals. While Australia is home to some of the world’s most dangerous spiders, such as the Sydney funnel-web and redback spiders, there are also many harmless species that benefit the environment. Understanding the size of spiders is important for identifying potential dangers, as Australia is home to both the smallest and largest spiders in the world. Prevention and eco-friendly options can be used to deal with spiders in Australia, but it is important to seek professional help when necessary.

The Smallest Spiders in Australia

Australia is home to some of the world’s smallest spiders. The Ananse spider, for example, is only 0.3 millimeters long, making it one of the tiniest spiders in the world. Despite its size, it is a fierce predator that preys on even smaller insects.

The Largest Spiders in Australia

On the other end of the spectrum, Australia is also home to some of the world’s largest spiders. The Huntsman spider, for example, can have a leg span of up to 30 centimeters. Despite their intimidating size, Huntsman spiders are generally harmless to humans and are even considered beneficial due to their role in controlling insect populations.

Misconceptions About Spider Size

There are many misconceptions about spider size, particularly when it comes to dangerous species. Many people believe that the larger the spider, the more dangerous it is. However, this is not always the case. For example, the Sydney funnel-web spider, one of the deadliest spiders in Australia, is only around 2-5 centimeters in length.

Dealing With Spiders in Australia

Living in Australia means being aware of the potential dangers of spiders. While most species are harmless, there are a few that can pose a serious threat to humans.


Prevention is the key to dealing with spiders in Australia. Keeping your home clean and free of clutter can help reduce the likelihood of spider infestations. Additionally, sealing up any cracks or gaps in your home’s exterior can help keep spiders out.


If you do encounter a spider in your home, it is important to deal with it quickly and safely. While some species can be safely removed by hand or with a broom, others require professional treatment. It is important to understand the difference and seek help if necessary.

Eco-Friendly Options

For those who prefer eco-friendly options, there are many natural remedies that can help deter spiders. Essential oils, such as peppermint and tea tree oil, are known to repel spiders and can be used as a natural deterrent.

FAQs – Spiders in Australia Size

What is the size of the biggest spider in Australia?

The biggest spider found in Australia is the Huntsman spider. They are commonly found throughout the country, and their leg span can reach up to 30 centimeters. However, the body of the spider usually only measures around 2 centimeters in length.

Are all spiders in Australia large?

No, not all spiders in Australia are large. In fact, there are many species of spiders in Australia that are much smaller than the Huntsman spider. The size of a spider can largely depend on its species and habitat. Some small spiders in Australia can be as tiny as a few millimeters in length.

What is the most common spider in Australia?

The most common spider in Australia is the Daddy Long Legs spider. They are found in almost every corner of the country and are known for their long legs and small, pill-shaped body. Daddy Long Legs spiders are not dangerous to humans and actually help to control other insect populations.

How dangerous are the large spiders in Australia?

Most large spiders in Australia, such as the Huntsman spider, are not considered dangerous to humans. They are known to be more afraid of humans than we are of them and will usually try to avoid contact. However, there are a few species of spiders in Australia, like the Sydney funnel-web spider, that are highly venomous and should be avoided at all costs.

Can spiders in Australia jump?

Yes, there are some species of spiders in Australia that can jump. The most common jumping spider in Australia is the Salticidae. These small spiders are typically more colorful than other species and have the ability to jump great distances to catch their prey.