Although only a nuisance in your home, on an isolated island chain (archipelago) off the northeastern coast of Brazil, rats pose a threat to the red-billed tropicbird (Phaethon aethereus). The seabird nests in the remote Abrolhos National Park, but two species of invasive rats prey on its eggs and young: the house rat (Rattus rattus) and the brown rat (Rattus norvegicus).