BOBER?

Some rodents that we call “rats” are not true members of Rattus, including the pack rat, naked mole rat, and giant pouched rat.

Rats are notorious stowaways that migrated around the world along with humans; today they live wherever Homo sapiens are found, on every continent except Antarctica. Rats are not just an inescapable feature of city living: In some ecosystems, particularly on islands, the invasive arrivals have wreaked havoc on bird and reptile populations by devouring eggs and young, driving many species to extinction.