Evidence for rat reinvasion following eradication. Gnawed chewsticks (A, right) and rat tracks (B) indicate that an island has been reinvaded by rats. Chewsticks are wood pieces soaked in edible oil. They are useful and cost-effective tools used to determine if an eradication attempt was effective at removing rats and to determine if rats have returned to an island after a successful eradication.

  Part of: Tabak MA, Poncet S, Passfield K, Martinez del Rio C (2015) Modeling the distribution of Norway rats (Rattus norvegicus) on offshore islands in the Falkland Islands. NeoBiota 24: 1-16. https://doi.org/10.3897/neobiota.24.8433