Here's a nice little description.....a bite From a Sydney Funnel Web spider....[deadliest 8 legged thingie]...
Remind me not to get bitten...
Symptoms and signs of envenomation include: Numbness around the mouth and spasms of the tongueNausea and vomiting, abdominal pain, acute gastric dilatation Profuse sweating, salivation, lacrimation, piloerection Local and generalized muscle fasciculation and spasm, commencing in facial tongue or intercostal muscles, and including trismus, which may necessitate paralysing the patient with muscle relaxants in order to manage the airwayDyspnoea Confusion, irrationality, coma which may persist in the presence of normalized ventilation, oxygenation and blood pressure, and may be related to raised intracranial pressure Hypertension, vasoconstriction, tachycardia and cardiac arryhthmias  ? related to release and subsequent depletion of neurotransmitter Widely dilated pupils, which may be fixed Acute non-cardiogenic pulmonary oedema Later, the severely envenomed patient may develop progressive hypotension and apnoea.  These features may relate to depletion of neurotransmitter.
Info on the Taipan....
Oxyuranus microlepidotus (Inland Taipan) is far and away the most toxic land snake in the world, with a lethal dose estimated to be fifty times that of the Indian cobra Naja naja. The venom has a potent neurotoxic mechanism that causes a significant loss of synaptic vesicles and other neuropathology's similar to that elicited by taipoxin from O. scutellatus. However, a specific neurological factor has not been isolated which can be held responsible for the acute potency of this venom. In addition, unlike the venom from scutellatus or the common tiger snake Notechis scutatus, this specie, like the eastern brown snake Pseudonaja textilis, has a procoagulant property that does not require the presence of the cofactors calcium, factor V or phospholipid in order to activate normal prothrombin or the decarboxylated form in a concentration-dependent manner.
Venom toxicity is 0.0l mgs per kg....average venom yeild 44.2 mgs....that adds up to 4420 kgs of dead people per snake....
Chris....
"Leaving Lepidoptery, please don't play with the displays, little boy...."
The Black Widow. [a relative of the Red Back]
Vincent Price....from Alice Cooper's 'Welcome to my Nightmare'
Chris....I paraphrased Mister Cooper....he [Price] was talking about the insect section...when 'leaving Lepidoptery' was mentioned....then he moves on to the Arachnids....so he wasn't wrong at all.....and I was merely being amusing....no intention of accuracy or pedantry....
DC...As for 'deadly animals'....check them out some time.....none of the variations come much like a 'second'...