In addition, there are a host of other nesting seabird species including Northern Royal Albatross , Pacific Albatross , Fulmar Prion , and Broad-billed Prion . Among the most-sought after seabirds found in the Chatham group is the Magenta Petrel , better known by its native name Taiko . The species was rediscovered 111 years after its discovery by the New Zealand biologist David Crockett . The total world population stands at less than 150 individuals. The Chatham Island Petrel breeds only on Rangitira.
Many threats face the dwindling population.
Cows and Sheep have been removed from Rangitira to allow recovery of natural vegetation however other introduced mammals remain and there is competition for nesting burrows with Black-winged Petrels which have recently colonized the island. Northern Royal Albatross breeds on Big and Little Sister and the Forty Fours. The almost endemic Pacific Albatross breeds on Big and Little Sister and the Forty Fours. The Pitt Island Shag occurs throughout the main islands can usually be found near the Waitangi wharf but otherwise nests on cliffs in eroded pockets or on ledges. Probably the best way to visit the islands is by ship, giving excellent opportunities to look at seabirds on the way.