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Description
Seabird poorly known and slightly bigger (L 20 cm) than Storm Petrel (Hydrobates pelagicus ) and with forked tail. Flight path slightly jerky and dancing with continual direction changes. They nest in earth burrows or under boulders. The food comprises planktonic crustaceans, copepods and other small marine species. Migrant.

Reasons for the need for protection/inclusion in annex I
The difficulties involved in carryng out censuses mean that population trends are very poorly known. Nevertheless, it is thought that the breeding population is around 100,000 pairs. The species is particularly susceptible to introduced predators (rats or cats) on breeding sites. Disturbance by tourists, military bombing and sea pollution are also listed as negative factors.

yellow = summer visitor
green = resident
blue = winter visitor

Population :
100,000 / 200,000 pairs

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