Identification: Glossy black cephalothorax and velvety black abdomen, often with reddish hairs.
Females grow up to 4cm in length, whereas males are smaller and more delicate.
Females dig a<unk>  shaped burrow under rocks, logs or building foundation and rarely stray, whereas males wander after reaching maturity and may enter buildings
Aggressive behavior, 4-5mm fangs which can penetrate a chicken skull, and potent venom make these among the deadliest spiders in the world.
Genus: Atrax and Hadronyche
The most clinically relevant species are restricted to Eastern Australia near Sydney and the central coast region of New South Wales and adjacent Blue Mountains.
Females grow up to 4cm in length, whereas males are smaller and more delicate.
Females dig a<unk>  shaped burrow under rocks, logs or building foundation and rarely stray, whereas males wander after reaching maturity and may enter buildings
Aggressive behavior, 4-5mm fangs which can penetrate a chicken skull, and potent venom make these among the deadliest spiders in the world.
Components of the venom include Atraxotoxin and Robustoxin which appear to induce widespread neurotransmitter release, resulting in neuromuscular and autonomic stimulation.
Funnel-web spider bite
Hymenoptera stings 
Armed spider bite
Mammalian bites
Octopus bite
Closed fist infection 
Brown recluse spider bite
Dog bite