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Cook's Petrel Pterodroma cookii



Conservation Status

Globally this species is considered Endangered because has a very small breeding range, despite the overall increase in numbers (driven by increases on Codfish and Little Barrier islands), there is the danger that it will lose a location (Great Barrier) in the near future. In Mexico it is not under some category of protection. On Little Barrier, introduced cats were a major predator of chicks and adults, Pacific rat (Rattus exulans) also preys a great amount of chicks. On Great Barrier, the population is severely threatened by cats, black rat (Rattus rattus) and Pacific rat. On Codfish, the population declined owing to severe predation by the introduced Weka (Gallirallus australis). Conservation measures underway are: Cats were eradicated from Little Barrier by 1980, and G. australis was eradicated from Codfish between 1980 and 1985. Pacific rat was successfully eradicated from Little Barrier Island in 2004, increasing fledging success from 5% to 70%. An eradication operation took place in 1998 on Codfish but the outcome of which is unknown. Conservation measures proposed are. Survey Codfish to locate new breeding burrows and colonies. Monitor breeding success and recruitment on Codfish, and map burrows at five-yearly intervals. Monitor status of population on Great Barrier: collect dead birds, tag and map active burrows, record locations of display areas. Implement appropriate pest control if a colony (more than five nests).

Effects of human activity on populations

Information needed. Contribute

Recommended Citation

Cook's Petrel (Pterodroma cookii), In Neotropical Birds Online (T. S. Schulenberg, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. retrieved from Neotropical Birds Online: