Ferdi the Pygmy Flying Phalanger and Robert Addison
"Ferdie spent a wild youth, but now is a reformed character. When he reached the larrikin stage, he acquired a taste for beer and could drink a long tablespoon with any squirrel, but at aerobatics, his judgment went to pieces after twenty minutes intermittent drinking, he even fell into a full glass of beer. Since then, not a drop of liquor has passed his lips. As one of the squadron’s mascots, the teetotal possum met with a lot of competition. Among his rivals were fifteen dogs, a cat, another possum and a rooster. FO Addison claims Ferdie’s success was due to his reputation for temperate living."
More Australian war animals on my BuzzFeed post about it.