Pitt Island shag (Phalacrocorax featherstoni)

Species information

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Threats

The Pitt Island shag is severely restricted by limited breeding space. It is thought that breeding success is affected by the presence of several introduced species on the islands, including cattle, sheep, pigs, cats, dogs, rats and the weka bird (Gallirallus australis). Birds are sometimes illegally shot by fisherman for stealing their catch and they are also caught in very large numbers in crayfish pots. Changes in the marine environment associated with climate change may be affecting the prey species of the Pitt Island shag (2).

Conservation

The sheep and cattle of Rangatira were removed in 1961, as were the sheep of Mangere Island in 1968. This was judged to have had a beneficial effect and authorities are now working to remove feral cats and weka from Pitt Island, and sheep, cattle and pigs from parts of Pitt and Chatham Island that are deemed to be suitable for nesting colonies. Colonies that appear to be suffering as a result of stock may be fenced off in the future, depending on agreements with local people and landowners (2).