Sooty Shearwater - status

 Puffinus griseus

Passage migrant.

The Sooty Shearwater breeds in New Zealand and its sub Antarctic islands, south west South America, the Falkland Islands, the South Atlantic islands and Australia. They spend winter in temperate sea areas in the North Pacific and North Atlantic. In the Atlantic they travel off the eastern seaboard of the Americas to the Newfoundland area, returning south off the western seaboard of Europe.

The Sooty Shearwater was first recorded in Pembrokeshire on the 9th September 1931 when R. M. Lockley saw one from a boat between Skokholm and Grassholm. Then Lockley et al (1949) stated “Seen fairly regularly during the early part of September off Skokholm.” 

A total of 41 were recorded between 1957 and 1978, most being logged at Skokholm but some were also noted off Skomer, South Bishop, from boats visiting Grassholm and the Smalls, from the Fishguard to Rosslare ferry and off Strumble Head.

They continued to be recorded on occasions at these places and also off St David’s Head, Ramsey, St Govan’s Head, from the Pembroke to Rosslare ferry, off the Swansea to Cork ferry and from small vessels visiting the Celtic Deep area. One to five birds per day were involved apart from 20 at the Celtic Deep on the 15th September 2002. However, much larger numbers were logged with greater regularity at Strumble Head between 1980 and 2006.

Overall annual pattern 1980-2006 at Strumble Head

 

(Expressed as the mean number of birds per six day periods. Values were adjusted for the seven day periods at the end of Aug and Oct by dividing their totals by seven and multiplying by six before calculating the mean.)

Passage has been recorded from the 3rd July to the 19th November, peaking in August and September but some sightings have been made outside this period. They were single birds at the Smalls on 22nd March 1984, at Whitesands Bay on the 28th December 2000, at Strumble Head on the 2nd January 1988, 3rd May 1982, 23rd December 1983 and 27th December 2006.

References

LOCKLEY. R. M, INGRAM. C. S. and SALMON. H. M.1949. The birds of Pembrokeshire, West Wales Field Society.