Tiger sharks (Galeocerdo cuvier) prey on fledglings as they swim near breeding islands, eating about 1 in 10 fledglings. Tiger sharks can also attack adults. Polynesian rats (Rattus exulans) have also been reported to attack incubating adults and nestlings. Adults will protect their nests using their bills. In the main Hawaiian islands, introduced predators such as dogs (Canis lupus familiaris) have killed Laysan albatrosses and, on Oahu, mongooses (Herpestidae) may be a threat.
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