How Do You Replicate The Habitat Of The Australian Net-casting Spider In A Captive Environment?

In the article, “How Do You Replicate The Habitat Of The Australian Net-casting Spider In A Captive Environment?”, you’ll dive into the intriguing process of mimicking the natural habitat of this fascinating arachnid. You’ll explore everything from setting up the perfect enclosure to maintaining the ideal temperature and humidity levels. Detailed guidance on selecting the right plants and substrates to create an authentic mini-ecosystem will help ensure that your spider feels right at home, showcasing its unique hunting behaviors just as it would in the wild. This article is your comprehensive guide to becoming an expert in keeping these mesmerizing spiders happy and healthy in captivity. Have you ever wondered how to replicate the habitat of the fascinating Australian net-casting spider in a captive environment? These incredible arachnids, also known as Deinopidae, are famous for their unique hunting method. Rather than spinning a traditional web, they create a small, rectangular net and cast it over unsuspecting prey. If you’re intrigued by these fascinating creatures and wish to keep them, understanding their natural habitat is crucial for their well-being. Let’s dive into the essentials to create an environment where these spiders can thrive.

How Do You Replicate The Habitat Of The Australian Net-casting Spider In A Captive Environment?

Understanding the Australian Net-Casting Spider

Natural Habitat

The Australian net-casting spider primarily resides in the forests and woodlands of eastern Australia. They prefer humid, warm climates but can also endure seasonal variations. These spiders are nocturnal hunters and will often be found clinging to branches or leaves, waiting to cast their nets over passing prey.

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Physical Characteristics

Before replicating their habitat, let’s take a close look at their physical characteristics. Net-casting spiders have long, spindly legs which they use to create and stretch their unique nets. Their eyes are notably large and positioned to enhance their night vision. This unique anatomy makes them proficient hunters in low light.

Hunting Behavior

One key aspect of these spiders’ behavior is their hunting method. Rather than attacking directly, they meticulously create a rectangular web and hold it between their front legs. When prey walks by, the spider stretches its legs, enlarging the net before quickly contracting it to ensnare the prey. Understanding this behavior helps in creating an environment that allows ample space for these activities.

Creating a Suitable Enclosure

Size of the Enclosure

First and foremost, the size of the enclosure should be adequate enough to accommodate the natural behavior of the net-casting spider. A spacious enclosure that allows the spider to move freely and set up its hunting grounds is essential. A recommended minimum size could be 12″x12″x18″ (30cm x 30cm x 45cm), but larger is always better.

Enclosure Size Dimensions
Minimum Size 12″x12″x18″ (30cm x 30cm x 45cm)
Ideal Size 18″x18″x24″ (45cm x 45cm x 60cm)

Material of the Enclosure

Using transparent materials such as glass or clear acrylic for the enclosure not only allows you to observe the spider but also mimics the openness of their natural surroundings. This transparency can also help in maintaining the right amount of light and temperature.


Good ventilation is critical in preventing mold and ensuring a fresh air supply within the enclosure. Inadequate ventilation can lead to excess humidity, which can be detrimental. Ensure that the enclosure has ample ventilation holes or mesh panels.

Replicating Environmental Conditions

Temperature and Humidity

The Australian net-casting spider thrives in warm and humid conditions. Aim for temperatures around 75-85°F (24-29°C) during the day and slightly cooler at night. For humidity levels, keeping it between 60-80% will be ideal.

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Environmental Condition Ideal Range
Temperature (Day) 75-85°F (24-29°C)
Temperature (Night) 65-75°F (18-24°C)
Humidity 60-80%


Since these spiders are nocturnal, they do not require extensive lighting. However, a light cycle that mimics natural day and night is beneficial. Using a timer for a 12-hour light/12-hour dark cycle can help regulate their activity and overall health.


The bottom of the enclosure should be covered with a suitable substrate to maintain humidity and mimic forest floors. A mix of coconut fiber, sphagnum moss, and organic soil can provide a natural feel and excellent humidity control.

Vegetation and Hiding Spots

Creating a habitat with branches, leaves, and plants can greatly emulate their natural environment. Branches are especially important as they give the spiders places to cling to, and the leaves can serve as ambush spots. Including some hiding spots using pieces of bark or hollow logs can help the spider feel secure.

Feeding the Net-Casting Spider

Diet in the Wild

In their natural habitat, net-casting spiders feed on a variety of insects, including moths, flies, and small crickets. Understanding their diet gives you insight into what you should provide in captivity.

Feeding in Captivity

In captivity, feeding these spiders is relatively straightforward. Providing a diet consisting of small crickets, flies, and other small insects mimics their natural diet. It’s important to offer live prey, as these spiders rely on movement to trigger their hunting response.

Common Food Frequency
Small Crickets 2-3 times per week
Flies 2-3 times per week
Moths Occasionally


Though they get most of their water from their prey, it’s beneficial to lightly mist the enclosure occasionally. This helps maintain humidity and provides droplets for extra hydration.

How Do You Replicate The Habitat Of The Australian Net-casting Spider In A Captive Environment?

Observing Health and Behavior

Signs of a Healthy Spider

A healthy net-casting spider will have a robust and active demeanor. It will consistently build and use its net and show normal feeding behavior. Clear eyes and a well-maintained exoskeleton are good signs.

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Common Health Issues

Be wary of common health issues such as dehydration, mold growth due to high humidity, and malnutrition. Regularly cleaning the enclosure and monitoring humidity and temperature levels can prevent these problems.


Molting is a natural part of a spider’s growth process. Be sure to provide a stress-free environment during this period. The spider may refuse food and become less active before molting. Once molting begins, avoid disturbing the spider to ensure the process completes successfully.

Handling and Interaction

Minimal Handling

Net-casting spiders are not particularly fond of handling. They are fragile and can easily get stressed when handled frequently. Observing them from outside the enclosure is the best way to interact without causing stress.

Cleaning the Enclosure

Regular cleaning is necessary to maintain a healthy environment. Remove any uneaten food immediately and replace the substrate every few months. Be gentle while cleaning to avoid disturbing the spider.

How Do You Replicate The Habitat Of The Australian Net-casting Spider In A Captive Environment?


Replicating the habitat of the Australian net-casting spider in a captive environment is a rewarding endeavor that requires attention to detail and an understanding of their natural behaviors. By focusing on the right temperature, humidity, enclosure size, and diet, you can provide a thriving habitat for these extraordinary spiders. These guidelines will not only help in creating a suitable environment but also ensure that your net-casting spider remains healthy and active, allowing you to enjoy the unique spectacle of their hunting prowess in close quarters. Happy spider-keeping!