Poisonous or venomous? The scorpion venom doesn't even seem to be harmful to the mouse, so it's not that the mouse is being daring and mental, the scorpion just isn't much of a threat to it. Whereas the lions are (obviously) a serious threat to the badger.
Sorry - the centipedes and tarantulas are venomous to the GM. As are the snakes that it kills and eats.