Australian Tick Identification Guide
What Kind of Tick Is This?
Found a tick and wondering what kind it is?
Australia has more than 70 species of ticks, and identifying one isn't always easy. Ticks can look quite different depending on their species, sex, age and whether they have recently fed.
For most Australians, however, there are a few key ticks worth knowing.
This simple guide will help you recognise some of the ticks you may encounter in Australia — particularly the Australian paralysis tick (Ixodes holocyclus), the species responsible for more than 95% of human tick bites along Australia's eastern seaboard.
Quick Tick Identification Guide
If you are trying to identify a tick, start with these questions:
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Where in Australia did you find it?
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Was it on a person, dog, cat, livestock or wildlife?
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How large is it?
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What colour is its body?
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What colour are its legs?
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Does it have visible markings?
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Is it flat or engorged after feeding?
Don't rely on colour or size alone. A tick can change dramatically in appearance after a blood meal.
Australian Paralysis Tick
Ixodes holocyclus
Most likely location: Eastern Australia
Common hosts: Native wildlife, dogs, cats and humans
Important feature: Adult females can produce the toxin responsible for tick paralysis.
The Australian paralysis tick is the most important species to recognise for people living in or travelling along Australia's eastern regions.
It is particularly associated with humid coastal environments and surrounding vegetation.
What does a paralysis tick look like?
An adult female paralysis tick typically has:
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eight legs
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relatively long mouthparts
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a hard shield behind the head
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characteristic colouring on the legs
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a relatively flat body before feeding
Once a female begins feeding, her abdomen expands considerably. An engorged paralysis tick can therefore look very different from an unfed tick.
This is one reason paralysis ticks can be difficult to identify from photographs alone.
Important: Size alone does not tell you whether a tick is a paralysis tick.
Young paralysis ticks can be extremely small and toxic.
Want to understand the different stages and sizes?
Read: The Life Cycle of an Australian Tick
Brown Dog Tick
Rhipicephalus sanguineus
Most commonly found on: Dogs
Appearance: Generally reddish-brown to brown
Distribution: Particularly associated with warmer regions
As its name suggests, the brown dog tick is strongly associated with dogs.
Adult brown dog ticks have a generally reddish-brown appearance. Females become larger and change appearance as they feed and become engorged.
This tick is different from the Australian paralysis tick and is particularly important for dog owners.
Australian Cattle Tick
Rhipicephalus australis
Most commonly found on: Cattle and other animals
Main distribution: Northern Australia and designated cattle tick areas
Importance: Major livestock parasite
The Australian cattle tick is primarily an animal and agricultural concern.
It is particularly associated with cattle but can also be found on other animals.
A female cattle tick becomes considerably larger when engorged and may appear grey, blue-grey or olive in colour.
Bush Tick
Haemaphysalis longicornis
Common name: Bush tick
Common hosts: Livestock and other animals
Distribution: Particularly eastern Australia
The bush tick is another species that may be encountered in Australia.
It can be found on livestock, wildlife and other animals and is particularly important in agricultural areas.
Its appearance can be similar enough to other ticks that reliable identification may require closer examination.
Ornate Kangaroo Tick
Amblyomma triguttatum
Native to: Australia
Common hosts: Kangaroos, wallabies and other animals
Can it bite humans? Yes
The ornate kangaroo tick is quite distinctive when its markings are clearly visible.
It is generally reddish-brown and can have pale or silvery markings on the upper surface of its body.
Although strongly associated with kangaroos and wallabies, it can also attach to other animals and humans.
Still Not Sure What Kind of Tick You Found?
That's completely understandable.
Even experienced people can have difficulty identifying a tick from appearance alone.
There are several reasons:
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ticks can be extremely small
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males and females may look different
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young ticks look different from adults
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feeding dramatically changes a tick's size and shape
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several Australian species look similar
A photograph found online should therefore be used as an identification guide rather than proof of species.
Where accurate identification matters, professional identification may be required.
Where You Found the Tick Can Give You a Clue
Location is an important part of tick identification.
For example:
Eastern coastal Australia:
The Australian paralysis tick is particularly important.
Warm northern regions:
Brown dog ticks may be encountered, particularly on dogs.
Cattle-producing regions:
Australian cattle ticks may be important.
Eastern agricultural areas:
Bush ticks may occur on livestock and other animals.
Parts of western, northern and inland Australia:
Ornate kangaroo ticks may be encountered.
However, location alone cannot confirm the species.
What Should I Do If I Find a Tick Attached?
If the tick is attached to a person, don't spend so long trying to identify it that appropriate tick management is delayed.
Australian recommendations for managing tick bites differ in some important ways from advice commonly found on overseas websites.
Follow current Australian health guidance.
If you or someone else develops concerning symptoms following a tick bite, seek medical advice. Severe allergic symptoms require urgent medical attention.
For pets, contact your veterinarian promptly if you are concerned about an attached tick or signs of tick paralysis.
Tick Identification Made Simpler
You don't need to become a tick expert to become tick aware.
Start with three things:
Look at the tick. Look at where you found it. Look at what it was attached to.
Then use reliable Australian information to narrow down the possibilities.
And remember: identification should never delay appropriate management of an attached tick.
Continue Learning with TickEase Australia
Life Cycle of an Australian Tick →
See how ticks change from egg to larva, nymph and adult.
What is a Tick →
Learn more about ticks.
How to Remove a Tick Safely in Australia →
Learn what to do when you find an attached tick.
Tick Prevention →
Learn practical ways to reduce tick encounters around your family, pets and outdoor activities.
TickEase Australia provides educational information to help Australians understand ticks and stay safer outdoors. This information is general in nature and does not replace individual medical or veterinary advice.