Social learning can reduce the costs associated with trial-and-error learning. There is speculation that social learning could contribute to trap and bait avoidance in invasive species like the Common Brushtail Possum (Trichosurus vulpecula) – a marsupial for which social learning has not previously been investigated. In large outdoor pens, we presented wild-caught ‘demonstrator’ possums with puzzle devices containing an attractive food reward; 2 of 8 demonstrators accessed the reward the first night the puzzle was...