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Tiger snakes are venomous reptiles found in various environments across Australia. They are known for their distinctive appearance, with banding that resembles that of a tiger, and their toxic venom. These snakes are found in coastal regions, wetlands, creeks, dams, and other habitats near water sources. Their distribution extends from the south of Western Australia through to South Australia, Tasmania, Victoria, New South Wales, and Queensland. While they are adaptable and versatile, their populations have declined due to human modification of their environments.
| Characteristics | Values |
|---|---|
| Scientific Name | Notechis scutatus |
| Common Name | Tiger Snake |
| Family | Elapidae |
| Genus | Notechis |
| Species | scutatus |
| Subspecies | occidentalis |
| Length | 0.9-1.2 m, occasionally 2.0 m |
| Weight | Not found |
| Colour | Light grey, pale yellow, olive, brown, green, black |
| Pattern | Banded, unbanded |
| Scales | 17-21 mid-body scale rows, 140-190 ventral scales, single anal scale |
| Venomous | Yes |
| Diet | Frogs, lizards, small mammals, birds, fish, tadpoles, invertebrates |
| Habitat | Coastal areas, wetlands, creeks, swamps, lagoons, urban settings |
| Distribution | South-eastern, southern, and southwestern mainland Australia (Queensland, New South Wales, Victoria, Tasmania, South Australia, Western Australia) |
| Reproduction | Ovoviviparous, with litters of 17-23 neonates, record of 109 recorded |
| Conservation Status | Not found |
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What You'll Learn
Tiger snakes are found in wetland environments
Tiger snakes are generalists, and their diet varies among populations. Mainland tiger snakes primarily feed on frogs and lizards, while those in Tasmania include larger quantities of mammals and birds. Insular populations may feed exclusively on the only available prey, such as scincid lizards. They are ovoviviparous, giving birth to 17-23 neonates, with a record of 109 recorded. They typically mate during the warmer spring season and give birth in summer.
Tiger snakes are found in a variety of habitats across south-eastern Australia, including Tasmania and certain offshore islands. Their territory spans from New South Wales to Victoria, South Australia, and parts of Western Australia, including Perth. They can be found in coastal areas, mountains, and urban settings. Their populations have declined due to human modification of the environment, especially for agricultural purposes, and urban expansion.
Tiger snakes are known for their toxic venom, which contains potent neurotoxins, coagulants, haemolysins, and myotoxins. Their bite can cause localized pain, tingling, numbness, sweating, breathing difficulties, and paralysis. They are not typically aggressive but will bite if interfered with. It is important to take precautions to minimize encounters with tiger snakes, such as maintaining a tidy yard and sealing gaps under doors and around pipes.
Tiger snakes exhibit remarkable diversity in size and colouration, with adults typically reaching lengths of up to 1.5 meters, although they can occasionally grow larger, with females often being larger than males. Their colour patterns vary from light grey to dark brown, with some exhibiting narrow cross-bands. They have a flat, blunt head, distinct from their robust body, and their scales appear like overlapping shields, especially around the neck.
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They are venomous and dangerous to humans
Tiger snakes are large and highly venomous snakes found in southern Australia, including its coastal regions, islands, and Tasmania. They are also found in the southwest of Western Australia. They are a protected species in most Australian states, and harming one can result in a fine of up to A$7,500 and even jail time in certain states.
Tiger snakes are dangerous to humans due to their toxic venom, which contains potent neurotoxins, coagulants, haemolysins, and myotoxins. The symptoms of a bite include localized pain in the foot and neck region, tingling, numbness, sweating, breathing difficulties, and paralysis. The mortality rate from untreated bites is estimated to be between 40% and 60%, with the lethal dose for humans being just 3 milligrams. While the availability of antivenom has reduced the number of fatal tiger snake bites, they are still considered one of the deadliest snakes in Australia, second only to the brown snake.
Tiger snakes are typically ground-dwelling but can also climb trees and buildings and are excellent swimmers. They are known to be aggressive when cornered and will adopt a threatening posture, hissing and inflating their bodies. They will bite forcefully if provoked, making them extremely dangerous to humans. Their venom is so potent that it can kill prey, and they may also bite an aggressor.
The western tiger snake, found in Western Australia, is a subspecies of the tiger snake. It is distinguished by its steel-blue to black colouration with bright yellow bands, although unbanded specimens do occur. The western tiger snake can grow up to 2 meters in length, making it larger than the average tiger snake.
In summary, tiger snakes are venomous and dangerous to humans due to their toxic venom and aggressive nature. They are widely distributed in southern Australia, including Western Australia, and can cause serious injury or death if encountered. It is important to seek immediate medical attention if bitten by a tiger snake and to respect their space if encountered in the wild.
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They are common in Perth and the southwest of Western Australia
Tiger snakes are common in Perth and the southwest of Western Australia. They are a venomous species with distinctive black and yellow banding, although their colouration can vary. They are large snakes, with an average length of 0.9 metres and a maximum length of 1.2 metres, though they have been known to grow up to 2 metres long. They are generalists when it comes to diet, feeding on frogs and lizards, and occasionally small mammals and birds. They are also known to eat carrion.
Tiger snakes are found in a variety of habitats, including coastal areas, wetlands, creeks, swamps, and urban settings. They favour moist environments and are skilled swimmers, able to stay underwater for nearly 10 minutes. This ability allows them to hunt in both land and water. They are ground-dwelling but can also climb trees and buildings. They are often found near permanent sources of water and in pastoral areas.
In Perth and the southwest of Western Australia, tiger snakes are well-adapted to the local environment. They are versatile snakes, able to survive in different ecosystems. Their populations can be supported by habitats that provide an abundance of prey. However, human modification of their environment, particularly for agriculture, has led to a decline in their numbers over time.
The venom of tiger snakes is a cause for concern, as it contains potent neurotoxins, coagulants, haemolysins, and myotoxins. The mortality rate from untreated bites is between 40% and 60%. The recommended treatment for a tiger snake bite is the pressure immobilization method, which involves using broad, thick bandages to inhibit the flow of venom through the lymphatic system.
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They are ground-dwelling but can climb and swim
Tiger snakes are usually ground-dwelling, but they are also excellent climbers and swimmers. They are often found in watery environments such as creeks, dams, rivers, drains, lagoons, wetlands, and swamps. They can also be found near human constructions and have been spotted as high as 10 metres above the ground.
Tiger snakes are typically found in locations that have plenty of hiding covers and are close to bodies of water. They typically seek shelter in fallen timber, deep vegetation, and empty burrows. They are also commonly found in coastal regions, where they favour wetlands and other habitats around watercourses.
Tiger snakes have a broad diet that includes fish, frogs, tadpoles, lizards, birds, and mammals, as well as carrion. They are largely diurnal and hunt for prey during the daylight hours, but they will also forage on warm evenings. They are known to be shy in nature and do not prefer confrontation when faced with a threat.
Tiger snakes are highly variable in colour, with base colours ranging from brown, grey olive, or green to steel blue and black. They are often identified by their banding, black and yellow like a tiger, but not all tiger snakes have this pattern. Some are unbanded, and their colour can range from yellowish-brown to black.
Tiger snakes are found in southwestern Australia, including the southwest corner of Western Australia, as well as other parts of the country such as Queensland, New South Wales, Victoria, South Australia, and Tasmania.
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They are highly variable in colour and patterning
Tiger snakes are highly variable in colour and patterning. They are found in many different colours, including brown, grey olive, green, olive-brown, jet black, and yellow. Some specimens even have a reddish belly. The banding on their bodies can also vary in thickness and colour, ranging from off-white to yellow. Some tiger snakes are also entirely patternless.
The colour and patterning of tiger snakes vary based on their geographical location. For example, the Chappell Island tiger snake is olive-brown to almost black, sometimes with lighter crossbands. On the other hand, the Peninsula tiger snake is generally jet black, and specimens on Kangaroo Island exhibit banding and uniform brown colours. Tiger snakes on Carnac Island in Western Australia are also reported to have a non-continuous distribution, indicating a variation in colour and patterning from those on the mainland.
The subspecies Notechis ater ater, found away from mainland Australia, is typically uniformly black. In contrast, the subspecies Notechis scutatus, found in south-eastern mainland Australia, exhibits more variation in colour and patterning. The Western tiger snake (Notechis scutatus occidentalis), found in the southwest corner of Western Australia, has a steel-blue to black colour with bright yellow bands.
The colour and patterning of tiger snakes can also vary within the same geographical location. For example, specimens on Kangaroo Island in South Australia can have varying colours, ranging from reddish-bellies to uniform brown colours. Additionally, individuals can show seasonal variation in colour.
The diverse characteristics of tiger snakes have led to their classification as distinct species or subspecies and regional variation. However, recent molecular studies have suggested that there may be only one wide-ranging species, Notechis scutatus, that varies greatly in size and colouration.
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Frequently asked questions
Yes, tiger snakes are found in Western Australia. They are usually found in coastal regions, where they favour wetlands, creeks, dams, swamps, and other habitats around watercourses.
Tiger snakes are highly variable in colour, ranging from light grey to dark brown, sometimes featuring narrow cross-bands that inspire their name. The western tiger snake is steel blue to black in colour with bright yellow bands.
Yes, tiger snakes are venomous and pose a significant risk to human safety. Their venom contains potent neurotoxins, coagulants, haemolysins, and myotoxins.
