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The UK Bird Atlas

Icterine Warbler (Hippolais icterina)Where and when to see it in the UK

Status not yet classified · reporting peaks May · Reed Warblers and Allies · BOU category A

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

Icterine Warbler (Hippolais icterina)
Jevgenijs Slihto from Riga, Latvia, CC BY 2.0, via Wikimedia Commons
Peak months
Icterine Warbler: 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.

Icterine Warbler has been recorded in 103 of the 2,971 10 km squares covering UK land (3%) in records to 2026. Its strongest squares are in England, Scotland and Wales. Reporting peaks in May.

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
3% to 100%
Moderate
<1% to 3%
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 1%<1%Moderate
May 93%<1%Very high
June 59%<1%Very high
July 5%<1%Low
August 100%<1%Very high
September 91%<1%Low
October 16%<1%Moderate
November 0%<1%Insufficient records
December 0%<1%Insufficient records

Squares with the highest reporting rate in May

SquareWhereShare of visitsClass
HP60Shetland Islands, Scotland100%Very high
HU35Shetland Islands, Scotland100%Very high
HU43Shetland Islands, Scotland100%Very high
HU47Shetland Islands, Scotland100%Very high
NL58Sea, off Na h-Eileanan Siar100%Very high
NN69Highland, Scotland100%Very high
TA17East Riding of Yorkshire, England100%Very high
TF56Lincolnshire, England100%Very high
TF57Lincolnshire, England100%Very high
TF74Norfolk, England100%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.