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The UK Bird Atlas

Corncrake (Crex crex)Where and when to see it in the UK

Status not yet classified · reporting peaks September · Rails, Gallinules, and Coots · BOU category AE*F

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

Corncrake (Crex crex)
Ziegentom (www.fotocommunity.de), CC BY-SA 3.0, via Wikimedia Commons
Peak months
Corncrake: 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.

Corncrake has been recorded in 227 of the 2,971 10 km squares covering UK land (8%) in records to 2026. Its strongest squares are in Scotland, England and Wales. Reporting peaks in September.

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
100% or more of visits
High
100% to 100%
Moderate
<1% to 100%
Low
under <1%
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%Very high
May 0%<1%Very high
June 0%<1%Very high
July 0%<1%Very high
August 56%<1%Very high
September 100%<1%Very high
October 20%<1%Low
November 0%<1%Very high
December 0%<1%Insufficient records

Squares with the highest reporting rate in September

SquareWhereShare of visitsClass
D15Causeway Coast and Glens, Northern Ireland100%Very high
HP60Shetland Islands, Scotland100%Very high
HU31Shetland Islands, Scotland100%Very high
NF74Na h-Eileanan Siar, Scotland100%Very high
NJ80Aberdeen City, Scotland100%Very high
NJ90Aberdeen City, Scotland100%Very high
NL94Argyll and Bute, Scotland100%Very high
NT87Scottish Borders, Scotland100%Very high
NT94Northumberland, England100%Very high
SJ18Flintshire, Wales100%Very 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.