Is There a Seagull?

i was thinking about this in connection withe some of these islands, particularly with the hawaiian islands. Many gulls cannot survive in hawaii because the islands lack the sort of shallow coastal scavenging waters that one finds in continental settings. Some ancient pacific islanders deduced the presence of previously unknown islands by observing the migratory terns of land birds. So it seems quite reasonable to assume that some islands were indeed discovered this way. But ultimately, it's its historical speculation and we don't know for sure.