The Australian bird-eating spider is one of the country’s most impressive arachnids. With a heavy, hairy body, powerful fangs, and a reputation for making strange whistling sounds, this Australian tarantula looks intimidating. Yet despite its dramatic name, birds are rarely part of its diet.
Australian bird-eating spiders spend much of their lives hidden in underground burrows, emerging to ambush insects and other small animals. They belong to the tarantula family, Theraphosidae, and are often called whistling spiders or barking spiders.
This guide explains how to recognize these spiders, how large they grow, where they live, what they eat, and what to know about their venom and bites.
Australian Bird-Eating Spider: Quick Facts
| Common names | Australian bird-eating spider, Australian tarantula, whistling spider, barking spider |
|---|---|
| Scientific classification | Family Theraphosidae; several Australian genera and species |
| Notable species | Selenocosmia crassipes, the Queensland whistling tarantula |
| Body size | Approximately 2–11 cm across Australian tarantula species |
| Leg span | Up to approximately 20 cm in large Australian tarantulas |
| Appearance | Heavy-bodied, hairy, usually brown or reddish-brown |
| Habitat | Underground burrows, woodland, forest and other suitable ground habitats |
| Diet | Primarily insects, with frogs, lizards and other spiders also taken |
| Venomous? | Yes. Bites can be painful and occasionally cause significant symptoms. |
| Hunting method | Ground-level ambush predator |
What Is an Australian Bird-Eating Spider?
The term “Australian bird-eating spider” does not refer to one single species. It is a common name used for several large, ground-dwelling Australian tarantulas.
These spiders belong to the family Theraphosidae, a group that includes many of the world’s largest spiders. They are also members of the mygalomorph lineage, which includes funnel-web spiders and several groups commonly called trapdoor spiders.
However, being related to trapdoor spiders does not make Australian tarantulas members of the same family. Most Australian tarantulas occupy silk-lined burrows without the characteristic hinged door associated with some trapdoor spiders.
One particularly well-known species is Selenocosmia crassipes, commonly called the Queensland whistling tarantula. The name Phlogius crassipes also appears in historical and specialist literature, but the World Spider Catalog currently accepts Selenocosmia crassipes.
Australia is home to multiple tarantula species, and many are difficult to identify without specialist examination. A large brown spider photographed in Queensland should not automatically be identified as S. crassipes.
What Does an Australian Bird-Eating Spider Look Like?
Australian bird-eating spiders have the sturdy appearance typically associated with tarantulas. Their bodies are broad and heavily built, with thick legs covered in numerous fine hairs.
Their coloration often ranges from pale brown or fawn to rusty brown and dark chocolate. Some individuals have a subtle silvery sheen. The exact color and proportions depend on the species, age, sex, and condition of the spider.
Key Identification Features
- Robust body: A large cephalothorax and rounded abdomen give the spider a heavy appearance.
- Thick legs: The legs are powerful, rather than extremely thin or delicate.
- Body hairs: Fine sensory hairs cover much of the body and legs.
- Large fangs: The downward-pointing fangs can deliver a painful defensive bite.
- Ground-dwelling habits: Adults are commonly associated with soil burrows rather than exposed aerial webs.
Size and hairiness alone are not enough for a reliable identification. Huntsman spiders, for example, can also appear large and hairy but belong to a different spider family and have a different body shape and lifestyle.
For comparison, see our guide to Australian huntsman spiders and their bites.
How Big Do Australian Bird-Eating Spiders Get?
Australian tarantulas rank among the largest spiders native to the country, although their size varies considerably among species.
According to the Australian Museum, Australian tarantulas can reach body lengths of roughly 2–11 cm, with a leg span approaching 20 cm in large individuals. These figures describe the broader Australian tarantula group, not every species.
For the Queensland whistling tarantula, Selenocosmia crassipes, the Australian Museum reports a body length of about 6 cm and a leg span of approximately 16 cm in large specimens.
Females often become larger and heavier than males. Adult males generally have slimmer bodies and spend more time moving across the ground when searching for mates.
Although a fully grown tarantula may look enormous when its legs are extended, its actual body is much shorter than its full leg span.
Where Do Australian Bird-Eating Spiders Live?
Australian tarantulas occupy a variety of terrestrial habitats, including tropical and subtropical forests, open woodland, grassland, and drier environments, depending on the species.
The Queensland whistling tarantula is associated primarily with Queensland, particularly parts of the state’s eastern region. Other Australian tarantula species occur across additional areas of the continent, including parts of the Northern Territory and other mainland states.
Not every Australian bird-eating spider lives in tropical rainforest. Some species are adapted to much drier habitats.
Underground Burrows
Adult females usually occupy burrows lined with silk. These shelters help maintain a relatively stable environment and provide protection from predators, excessive heat, and drying conditions.
A burrow may be identified by an opening in the soil, sometimes surrounded by loose earth, grass, or fine silk. The Australian Museum describes burrows varying considerably in depth, often approximately 40–100 cm.
Rather than constructing a large sticky web to intercept flying insects, these spiders use their burrows as retreats and hunting stations. Silk around the entrance may help them detect disturbances caused by approaching prey.
Young spiders and some males may shelter beneath rocks, logs, or other protective structures instead of living permanently in a deep burrow.
What Do Australian Bird-Eating Spiders Eat?
Despite the name, Australian bird-eating spiders are not specialized bird hunters.
Their principal food consists of insects and other small animals they can overpower. Common prey categories include:
- Crickets and grasshoppers
- Beetles and other large insects
- Other spiders
- Small frogs
- Small lizards
Bird predation is unusual. Under exceptional circumstances, a large tarantula may take a vulnerable nestling, particularly from a nest close to the ground. But birds are not a regular or essential part of its diet.
How They Hunt
Australian tarantulas rely heavily on touch and vibration to detect prey. Their numerous sensory hairs help them interpret movements in the immediate environment.
When a suitable animal approaches, the spider can rush forward, seize it with its legs and mouthparts, and deliver venom through its fangs. Digestive fluids help break down the prey’s tissues before the spider consumes them.
Unlike many orb-weaving spiders, Australian bird-eating spiders do not depend on large suspended capture webs. They are predominantly ambush hunters operating on or near the ground.
Why Are They Called Whistling or Barking Spiders?
One of the most remarkable features of Australian tarantulas is their ability to make a defensive sound.
The sound is produced through a process known as stridulation. The spider rubs specialized structures on its palps against corresponding structures near the bases of its jaws.
This movement creates a hissing, humming, or whistling sound. Although people sometimes describe it as barking, it is not a true bark and does not involve vocal cords.
Stridulation is most noticeable when a spider is threatened. It may also raise the front of its body and display its fangs as part of a defensive posture.
The sound serves as a warning to potential predators. It is not a sign that the spider is actively hunting humans.
Australian Bird-Eating Spider Lifespan and Reproduction
Female Australian tarantulas generally live longer than males. Their life histories are closely tied to a relatively sheltered existence inside underground burrows.
The Australian Museum reports that females of the studied species Selenocosmia stirlingi may survive for up to approximately 12 years, while males commonly die around five years of age after reaching reproductive maturity and mating.
Lifespans should not be treated as identical across all Australian tarantulas. Species, habitat conditions, and captivity can influence survival, and exceptionally long-lived individuals may occur.
Mating Behavior
Adult males leave their shelters to search for females, often during seasonal periods of reproductive activity.
When a male locates an occupied burrow, he uses vibrations and movements of his palps to signal his presence. These signals help distinguish a potential mate from prey or an intruder.
Following mating, the female remains associated with her retreat while the male moves away.
Egg Sacs and Spiderlings
Female tarantulas produce silk egg sacs within protected retreats. The number of eggs varies by species.
For example, the Australian Museum describes female Selenocosmia stirlingi producing approximately 50 eggs in an egg sac about 30 mm across.
Spiderlings develop inside the sac before emerging. Young spiders may remain in the maternal retreat for a period before dispersing to establish their own shelters.
This protective behavior is particularly important because young tarantulas are vulnerable to predators, dehydration, and unsuitable environmental conditions.
Are Australian Bird-Eating Spiders Dangerous to Humans?
Australian bird-eating spiders are venomous, and their bites should be taken seriously. However, they do not normally seek confrontation with people.
Most defensive encounters occur when a spider is handled, cornered, or accidentally disturbed.
Their relatively large fangs can cause substantial puncture pain. The Australian Museum also reports that some bites have caused significant illness, including nausea and vomiting lasting several hours.
The effects of a bite may depend on the spider involved and the individual bitten. It is therefore misleading to describe all Australian tarantula bites as completely harmless.
Possible Bite Symptoms
- Pain around the bite site
- Local swelling or irritation
- Discomfort from puncture wounds
- Nausea or vomiting in some cases
- Other symptoms requiring medical assessment
An important safety issue is that Australian tarantulas may be confused with other large, dark spiders. Funnel-web spiders, for example, can cause life-threatening envenomation and require emergency treatment.
What Should You Do After a Bird-Eating Spider Bite?
Appropriate first aid depends on whether the spider has been reliably identified.
If a Tarantula Is Reliably Identified
For a bite confidently attributed to an Australian tarantula, wash the affected area with soap and water. A cold pack wrapped in a cloth may help reduce local pain and swelling.
Seek medical assessment for severe pain, vomiting, worsening symptoms, or symptoms that do not settle.
If the Spider Is Unknown or Could Be a Funnel-Web
If the spider cannot be identified and a dangerous Australian spider is possible, do not rely on ordinary home treatment.
In Australia, call 000 for a suspected funnel-web or large black spider bite. Keep the person still and follow emergency first-aid instructions, including pressure immobilization where indicated for a suspected funnel-web or mouse spider bite.
Difficulty breathing, collapse, or signs of a severe allergic reaction require immediate emergency assistance.
Do not attempt to pick up a live spider with your bare hands. A photograph taken from a safe distance may help with identification, but should never delay treatment.
Do Australian Bird-Eating Spiders Really Eat Birds?
The name sounds dramatic, but it is a poor description of these spiders’ everyday behavior.
Large tarantulas are physically capable of subduing some small vertebrates. Nevertheless, their normal diet is dominated by insects and other readily available ground-level prey.
Confusion also arises because photographs sometimes show large spiders feeding on birds caught in webs. Those incidents may involve entirely different spiders.
Australian Tarantula vs. Golden Orb-Weaver
Golden orb-weavers construct strong suspended webs between vegetation. Very occasionally, a small bird or bat may become entangled in such a web, allowing the spider to feed on an unusually large animal.
Australian bird-eating tarantulas, by comparison, typically hunt from ground-level shelters. They do not build the same large circular aerial webs.
| Feature | Australian Tarantula | Golden Orb-Weaver |
|---|---|---|
| Family | Theraphosidae | Araneidae |
| Typical habitat | Ground burrows | Suspended webs in vegetation |
| Hunting method | Ambush | Web capture |
| Typical prey | Insects and small ground animals | Flying insects |
| Bird predation | Rare and opportunistic | Rare and accidental web capture |
To explore the differences further, read our golden orb-weaver identification guide.
Do Australian Bird-Eating Spiders Have Natural Predators?
Despite their size, Australian tarantulas are not invulnerable. Their predators may include vertebrates and other animals capable of attacking spiders.
A deep burrow offers a valuable first line of defense. When retreat is impossible, some tarantulas adopt a threatening posture and produce their characteristic hissing sound.
Their brown coloration also helps them blend into soil, leaf litter, and rocky surroundings.
These adaptations help reduce encounters with predators, but they do not eliminate the risks of living on the ground.
Conservation and Why These Spiders Matter
Australian tarantulas contribute to local food webs as predators of insects and small animals. They also provide food for other wildlife.
Although Australian tarantulas are not generally classified as a threatened group, their populations may face localized pressure from habitat disturbance and collection for the exotic pet trade.
Because females can spend years in the same burrow, removing mature adults may affect local populations, especially where a species has a restricted distribution.
The Australian Museum has raised concerns about the collection of wild tarantulas from northern Queensland, including species that may not yet have been formally described.
The most responsible response to finding an Australian bird-eating spider in the wild is to observe it without disturbing its retreat.
Frequently Asked Questions
Are bird-eating spiders native to Australia?
Yes. Australia has native tarantulas commonly called bird-eating, barking, or whistling spiders. They belong to the family Theraphosidae.
What is the largest bird-eating spider in Australia?
The Queensland whistling tarantula, Selenocosmia crassipes, is among Australia’s largest spiders. The Australian Museum reports a leg span of around 16 cm for this species, while some Australian tarantulas may reach approximately 20 cm.
Can an Australian bird-eating spider kill a human?
Australian tarantulas are not regarded as major causes of fatal spider envenomation in humans, but their bites can be painful and sometimes cause substantial illness. An unidentified large spider bite should never be assumed harmless.
Are Australian bird-eating spiders aggressive?
They are primarily defensive rather than actively aggressive toward humans. They may raise their bodies, hiss, or bite when threatened or handled.
Do Australian bird-eating spiders make webs?
Yes, but usually not the large circular capture webs associated with orb-weavers. Australian tarantulas use silk to line burrows, protect egg sacs, and support other activities.
How long do Australian bird-eating spiders live?
Lifespan varies among species. In the Australian tarantula Selenocosmia stirlingi, females may live up to approximately 12 years, while males commonly survive for about five years.
Can Australian bird-eating spiders climb walls?
Australian tarantulas have specialized gripping hairs on their feet that can help them climb smooth surfaces. This is particularly important to remember when handling captive spiders or securing enclosures.
Final Thoughts
The Australian bird-eating spider deserves attention for more than its size or intimidating name. Its underground lifestyle, sensitive hunting adaptations, unusual defensive sounds, and long reproductive cycle make it a fascinating part of Australia’s arachnid fauna.
Although it may occasionally take small vertebrate prey, this tarantula is primarily a ground-dwelling predator of insects and other small animals. Its name should not be confused with the very different golden orb-weavers that sometimes capture birds in suspended webs.
Recognizing these differences makes it easier to understand the spider’s ecological role and to appreciate it without unnecessary fear or disturbance.
For more information about keeping tarantulas and understanding their behavior, see our article on Australian tarantula facts and pet considerations.
References and Further Reading
Australian Museum. “Australian Tarantulas.” Updated December 10, 2025.
Australian Museum. “Spider Facts.” Updated April 20, 2026.
World Spider Catalog, Natural History Museum Bern. “Selenocosmia crassipes (L. Koch, 1874).” Taxonomic species record.
Healthdirect Australia. “Spider Bites: Treatment, Symptoms and First Aid.”
Australian Geographic. “Fact File: Australian Tarantula.”
