|Puffinus||auricularis||PO||ec, islands off w Mexico|
Until recently the shearwaters were devided in two genera Calonectris and Puffinus, but based on dna-analysis Penhallurick and Wink (2004) have proposed a splitting of the shearwaters into three genera: Calonectris for the large shearwaters of the Northern Atlantic, the Mediterranean and the waters around Japan, Ardenna for a group of large Southern Hemisphere breeders and Puffinus for the smaller shearwaters such as the Manx’ group, Audubon’s and Little Shearwaters. This new taxonomy is now widely accepted, but not by all and is stil subject of discussion.
|wingspan min.:||76||cm||wingspan max.:||89||cm|
|size min.:||31||cm||size max.:||35||cm|
|incubation min.:||0||days||incubation max.:||0||days|
|fledging min.:||0||days||fledging max.:||0||days|
Cats were introduced to Socorro in the early 1970s, and more than 92% of cat scats above 500 m contain shearwater remains. Reports that rats have recently colonised Socorro are not confirmed. Sheep are destroying nesting habitat across some parts of its colonies, through overgrazing and soil compaction. Pigs were introduced to Clarion soon after 1979, and by 1988 numerous shearwater remains littered burrows destroyed by severe pig rooting. Sheep (introduced in c.1990) and rabbits have also destroyed habitat and nesting sites on Clarion. In 1952, a volcanic eruption obliterated the San Benedicto population. Potential developments on Socorro including enlargements to the airstrip and the possibility of a new federal prison could destroy breeding habitat, increase light pollution and increase the risk of accidental introduction of other invasive species8. Having a distribution on relatively low-lying islands, this species is potentially susceptible to climate change through sea-level rise and shifts in suitable climatic conditions.