Yellow-browed Warbler (Phylloscopus inornatus)Where and when to see it in the UK
Passage migrant · reporting peaks October · Leaf Warblers · BOU category A
Peak months
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.
Yellow-browed Warbler has been recorded in 558 of the 2,971 10 km squares covering UK land (19%) in records to 2026. Passage migrant in the UK. Its strongest squares are in England, Scotland and Wales. Reporting peaks in October.
Conservation status: Least Concern (IUCN Red List, LC)
View on the IUCN Red List- Very high
- 100% or more of visits
- High
- 8% to 100%
- Moderate
- 2% to 8%
- Low
- under 2%
- 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
Relative to this species' best squares (how classes are calculated)
Seasonality
| Month | Relative to peak | Share of visits | Typical class |
|---|---|---|---|
| January | 4% | <1% | Low |
| February | 1% | <1% | Low |
| March | 1% | <1% | Very high |
| April | 0% | <1% | Low |
| May | 0% | <1% | Low |
| June | 0% | <1% | Insufficient records |
| July | 0% | <1% | Very high |
| August | 0% | <1% | Very high |
| September | 41% | 1% | Low |
| October | 100% | 4% | Very high |
| November | 8% | <1% | Very high |
| December | 5% | <1% | Low |
Squares with the highest reporting rate in October
| Square | Where | Share of visits | Class |
|---|---|---|---|
| J58 | Ards and North Down, Northern Ireland | 100% | Very high |
| NB34 | Na h-Eileanan Siar, Scotland | 100% | Very high |
| NC46 | Highland, Scotland | 100% | Very high |
| NF76 | Na h-Eileanan Siar, Scotland | 100% | Very high |
| NF87 | Na h-Eileanan Siar, Scotland | 100% | Very high |
| NF96 | Na h-Eileanan Siar, Scotland | 100% | Very high |
| NF98 | Na h-Eileanan Siar, Scotland | 100% | Very high |
| NG30 | Highland, Scotland | 100% | Very high |
| NJ86 | Aberdeenshire, Scotland | 100% | Very high |
| NK03 | Aberdeenshire, Scotland | 100% | Very high |