I have a brushtail possum living in my roof.....cute lil fella.
Every night we leave a bowl of fruit out for him/her.
Doesn't like banana or grapes tho.....
Soon I have to make a possum box and affix it to one of my trees in the backyard.........I've been told the best way to get them out of the roof is to make them another home....leave a trail of fruit to the possum box each night, and then after about a week, put camphor in the roof. Then the possum will move to the new home.