There are three living here but one jumped off the side and decided to go for a long dive :) It's also bigger than these two in the picture.
The container, we actually use to soak our coir bricks when making our own garden soil. Water has gotten in it from rain, so they are hibernating there by the looks. Would have thought it'd get too cold but the container has sun on it all day and would probably keep the heat well at night too... Clever little things :)