3. Eastern brown snake, common brown snake (Pseudonaja textilis)
LD50: 0.05
This snake is common in many different habitats, from forests, pastures, savannahs, coastal areas, but it is also present in semi-urban areas. It is a long snake, the average length of 1.1-1.8 meters, and usually brownish colored, though that can vary depending on the surroundings. Apart from being one of the most venomous snakes in Australia, it is also very dangerous, according to the National Coronial Information Service, it has caused up to 35 deaths in period 2000-2016.