I have put this page together with permission from Peter Mirtshchin
co author of the book snakes of Australia Dangerous & harmless
to show Australia's most Venomous snakes , not to be confused with the order of most dangerous snake.
This book can be bought from time to time on Ebay or second hand shops and is a great Field guide of Australia's snakes both venomous and harmless.

I myself have kept most of the venomous snakes that are listed below,
and have found a great enjoyment and respect from keeping venomous snakes,
all though care must be taken , not all venomous snakes are of an aggressive nature,
and would not recommend free handling of venomous snake.
Mick Mather
southcoastreptiles@bigpond.com

The LD50 Method

The LD50 Described
The LD50 is a standard laboratory test with set guidelines laid down by the World Health Organisation. With the toxicity test in snakes, individual mice within a sample receive equivalent quantities of venom (each mouse is of the same weight). Each sample receives less venom than the previous. The LD50 is the amount of venom administered to each mouse to cause 50% of the sample to die. The lower the LD50 the higher the toxicity is on mice!. For the limitations and problems with this type of test see White (1987).
LETHALITY IN MICE
From Broad, Sutherland & Coulter (1979)
(In descending order including LD50 in mg/kg administered subcutaneously. In first figure venom diluted in saline solution only, 2nd includes the addition of a blood protein, bovine serum albumin)
Inland Taipan (Oxyuranus microlepidotus) 0.025 0.01
Eastern Brown Snake (Pseudonaja textilis) 0.053 0.041
Northern Taipan (Oxyuranus scutellatus) 0.099 0.064
Eastern Mainland Tiger Snake (Notechis s. scutatus) 0.118 0.118
Reevesby Island Tiger Snake (Notechis ater niger) 0.131 0.099
Beaked Sea Snake (Enhydrina schistosa) 0.164 0.173
Western Mainland Tiger Snake (Notechis scutatus occidentalis) 0.194 0.124
Black Mamba (Dendroaspis polylepis) 0.32
Chappell Island Tiger Snake (Notechis ater serventyi) 0.338 0.271
Southern Death Adder (Acanthophis antarcticus) 0.4 0.338
Gwardar (Pseudonaja nuchalis) 0.473
Copperhead (Austrelaps superbus) 0.56 0.5
Indian Cobra (Naja naja) 0.565 0.5
Dugite (Pseudonaja a. affinis) 0.66 0.56
Papuan Black Snake (Pseudechis papuanus) 1.09 1.36
Stephens's Banded Snake (Hoplocephalus stephensii) 1.36 1.44
Rough-scaled Snake (Tropidechis carinatus) 1.36 1.09
King Cobra (Ophiophagus hannah) 1.8 1.91
Spotted Black Snake (Pseudechis guttatus) 2.13 1.53
Collett's Snake (Pseudechis colletti) 2.38
King Brown Snake (Pseudechis australis) 2.38 1.91
Red-bellied Black Snake (Pseudechis porphyriacus) 2.52 2.53
Small-eyed Snake (Cryptophis nigrescens) 2.67
Eastern Diamond-backed Rattlesnake (Crotalus adamanteus) 11.4 7.70
Olive Whip Snake (Demansia olivacea) 714.2

In 1979, the Commonwealth Serum Laboratories in Australia conducted an extensive
comparative study of the toxicity of most of the Australian medically significant snake
venoms and some venoms from -Australian snakes. Here they used mice which
were subcutaneously injected with the crude venoms. In the early 1980's, Richard
Davis and Peter Mirtschin published the cobra scale, which compared venoms with that of the well known Indian cobra venom. Cobra venom is assigned the value of 1 and the toxicity of other venoms are compared to this venom.