Living in the bush, I get a fair amount of creatures in my house. By far the most common are ants, spiders resembling daddy long legs, and house flies. The latter is the most annoying by far. I've also killed 2 scorpions and a few bigger spiders, without stopping to photograph them ;)
But some of the larger things that have tried to move in with me include:
Curious baby goats
Setotojanes, or corn crickets
various lizards, possibly living in my suitcase
a preying mantis
a bat
a non poisonous whip snake, which involved calling my neighbors to help me find it and get rid of it
a mouse
and a bird that got lost in bathroom, with lots of resultant flapping.
All creatures made it out alive except the snake and the mouse. People here kill all snakes, and the mouse had already died because I sprayed too much doom trying to get rid of some ants. Most things I was happy to live and let live, just you know, not in my house.