For instance the adorably goofy duck-billed platypus looks less threatening then a pet cat but believe it or not the male platypus has a spur on its hind foot that is more than capable of delivering severe pain to humans. This venom is extremely lethal to smaller creatures including dogs while afflicting enough pain to seriously incapacitate any human affected. Oedema, or fluid filled swelling, develops around the wound and then spreads throughout the limb as the pain develops into a long-lasting heightened sensitivity. Unlike its venomous insect or reptile counterparts, this toxin is actually utilized for asserting dominance during mating season rather than to kill or immobilize prey. I’m sure humans wouldn’t mind the perk of being able to stop a competitor right in their tracks while trying to get a date, but imagine trying to explain to your buddies that a Platypus won a fight against you…