Considering the only poisonous snake in Finland is the (non-lethal) adder, the Kalevala is surprisingly full of warnings about venomous snakes, spiders, insects, etc.
The Finnish Karelian coat of arms looks like an Adventure Time character:
The Russian one is a fire-breathing bear with knuckledusters (pawdusters? clawdusters?), which might also make a good Adventure Time character:
