Thanks for sharing!
Speaking as an Australian, common spiders which aren't poisonous (e.g., daddy long-legs, huntsmen, little jumpy-guys) is general knowledge. As is the really bad ones (funnel webs, redbacks). If you're bitten by something else, you generally assume it's somewhat poisonous and pay close attention to how you're feeling.
This kind of approach would have more impact for snakes, whose venom can vary significantly -- although hanging around to snap a picture seems dangerous. Perhaps a suggestion system based on salient features?
The app helps people make the decision as to whether its a harmless spider or something that requires urgent medical attention.
Funnel-webs are terrifying.
In fact, since the numbers are so small, widespread useful of such an app seems like it may actually increase the number of deaths: instead of people seeing an unidentified spider and intense pain and getting treatment, people may get a false classification and so endure the pain without prompt-enough treatment ("the app says it's just a [something other than a funnelweb], I'll be fine!").
Not saying a doctor is perfect, though I find they're often better than they get credit for.
def spiderIsDeath():
return True
I wonder how different bites present themselves - if there is enough differentiation to provide a conclusive level feedback.