Roosevelt apparently feel obligated to sound Australian while on public display at the zoo; however he don’t put up with the patrons nonsense. In reality, his natural attitudes appear to be less stereotypically Australian. It is known he prefers Australian football over "the sissy American version," as seen in the one-off strip Nachos And Thou, and Roosevelt does have a taste for Vegemite. Roosevelt is a bit more sensitive and emotional. Other than that it’s clear the he loves Bruce.