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The UK Bird Atlas

Wilson's Storm-petrel (Oceanites oceanicus)Where and when to see it in the UK

Status not yet classified · reporting peaks August · Southern Storm Petrels · BOU category A

Records to 2026-08-16 · build 2026-08-31

Wilson's Storm-petrel (Oceanites oceanicus)
JJ Harrison (https://www.jjharrison.com.au/), CC BY-SA 3.0, via Wikimedia Commons
Peak months
Wilson's Storm-petrel: relative reporting rate by 10 km square, September

Contains OS data © Crown copyright and database right 2026 (grid squares, place names from OS Open Names). Northern Ireland place names: OSNI Open Data, OGL v3.0. County and country boundaries: Office for National Statistics, Open Government Licence v3.0. Coastline: Natural Earth. Bird records from the data partners listed here.

Wilson's Storm-petrel has been recorded in 26 of the 2,971 10 km squares covering UK land (1%) in records to 2026. Its strongest squares are in England and Wales. Reporting peaks in August.

Conservation status: Least Concern (IUCN Red List, LC)
View on the IUCN Red List
Relative to this species' best squares (how classes are calculated)
Very high
32% or more of visits
High
10% to 32%
Moderate
3% to 10%
Low
under 3%
Surveyed, not recorded
at least 20 qualifying visits, no record
Insufficient records
too few visits to say
Lighter fill
Few visits, lower confidence
Small dot
Occasional: a single record, or out of season

Seasonality

Reporting rate by month, relative to the peak month
MonthRelative to peakShare of visitsTypical class
January 0%<1%Insufficient records
February 0%<1%Insufficient records
March 0%<1%Insufficient records
April 0%<1%Insufficient records
May 0%<1%Insufficient records
June 2%<1%Low
July 22%<1%Very high
August 100%<1%Very high
September 4%<1%Low
October 0%<1%Insufficient records
November 0%<1%Insufficient records
December 0%<1%Insufficient records

Squares with the highest reporting rate in August

SquareWhereShare of visitsClass
SW61Cornwall, England100%Very high
SW91Sea, off Cornwall100%Very high
SV70Sea, off Isles of Scilly76%Very high
SW02Sea, off Isles of Scilly73%Very high
SW00Sea, off Isles of Scilly73%Very high
SV90Isles of Scilly, England66%Very high
SV80Sea, off Isles of Scilly32%Very high
HP20Sea, off Shetland Islands29%High
SV92Sea, off Isles of Scilly27%High
SW82Cornwall, England21%High

Spotted an error in a square? Report it and it goes into the review queue. Read the methodology for how classes, flags and sensitive-species rules work. Data to 2026.