AnimalsAustraliaReptilesSnakesVenomous snakes

Inland taipan – the most venomous snake

Inland taipan (Oxyuranus microlepidotus)

The most venomous snake in the world

The inland taipan is the number one snake on the list of the most venomous snakes living today on Earth. During a single bite this snake injects a portion of venom able to kill 100 people! Similarly to the whole 10 most venomous snakes, the inland taipan lives in Australia. It has the most toxic venom known to science today.


  • Class: Reptilia
  • Order: Squamata
  • Suborder: Serpentes
  • Family: Elapidae
  • Genus: Oxyuranus
  • Species: Inland taipan (Oxyuranus microlepidotus)
  • Names: inland taipan, western taipan, small-scaled snake, fierce snake
Inland taipan (Oxyuranus microlepidotus)
Inland taipan (Oxyuranus microlepidotus) – the most venomous snake in the world.

Areas of occurrence

Inland taipan lives only in the Australian deserts.


Inland taipan changes its coloration depending on the season of the year. During summer it becomes straw-colored, dark brown in winter. It is a result of adapting to a harsh climate it lives in and allows an appropriate body heat regulation through changing the level of sunlight absorption. Taipan`s average length is 1.8 meters (5.9 ft), but it can grow as long as 2.5 m (8.2 ft).

Although taipan has the most toxic venom known known to science, its common name ‘Fierce Snake’ fits only the description of its venom rather than character. It actually is a very venomous snake, yet in reality it is also very shy and always prefers to flee when in danger.

This snake is typically solitary.

Inland taipan (Oxyuranus microlepidotus)
Inland taipan changes its coloration depending on the season of the year.


The inland taipan`s diet consists of almost only small mammals. Rats are its favorite food.


This snake`s breeding depends on the rat population. In an abundant year, when rat population grows in numbers, the corresponding number of those dangerous snakes grows proportionally. A female normally lays from 12 to 20 eggs.

Inland taipan (Oxyuranus microlepidotus)
Median lethal dose LD50 of inland taipan`s venom is only 0.025 mg/kg.

The most toxic venom known to mankind

Lethal Dose (LD) is an indication of toxicity of a given substance, or its harmfulness. LD50 (the mortality of half of the specimen) has varies in value depending on the application technique (orally, intravenously, intramuscularly, through inhalation).

In case of an inland taipan LD50 may appear with the following values:

  • LD50SC (subcutaneously) – 0.106 mg/kg – kills the half of 416 thousand mice / the median of LD50SC is 0.025 mg/kg)
  • LD50SCII (subcutaneously in the bovine serum albumin ) – 0.01 mg/kg – kills half of 2 million mice
  • LD50IV (intravenously) – 0.013 mg/kg – kills half of 3.3 million mice
  • LD50IP (intraperitoneal) – 0.009 mg/kg – kills half of 4.9 million mice
  • LD50IM (intramuscularly) – we lack sufficient data

In case of a subcutaneous injection the median lethal dose LD50 of inland taipan`s venom is only 0.025 mg/kg (mice tests).

The maximum portion of venom injected during a single bite is 100 mg. This means that a single bite could kill 100 adult people. Time required for venom to take effect is 45 minutes. However humans are extremely rarely bitten by the taipan and people hospitalized after such a bite – survived.

Inland taipan (Oxyuranus microlepidotus)
Venom portion injected in a single bite could kill 100 adult humans.

Characteristic / size

Inland taipan (Oxyuranus microlepidotus)

Related Articles
  • Length: 180 – 250 cm
  • Ffangs: 3.5 – 6.2 mm
  • Lifespan: 10 – 15 years in the wild, over 20 years in captivity
  • Venom dose: up to 110 mg (average 44 mg)
  • Venom toxicity: LD50SC: 0.025 mg/kg
Inland taipan (Oxyuranus microlepidotus)
Inland taipan (Oxyuranus microlepidotus).


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