Treecreeper (Certhia familiaris)Where and when to see it in the UK
Resident · reporting peaks December to April · Treecreepers · BOU category AF
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.
Treecreeper has been recorded in 2,329 of the 2,971 10 km squares covering UK land (78%) in records to 2026. Resident in the UK. Its strongest squares are in England, Scotland and Wales. Reporting peaks in December to April.
Conservation status: Least Concern (IUCN Red List, LC)
View on the IUCN Red List- Very high
- 20% or more of visits
- High
- 10% to 20%
- Moderate
- 4% to 10%
- Low
- under 4%
- 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 | 89% | 7% | Very high |
| February | 99% | 7% | Very high |
| March | 100% | 7% | Very high |
| April | 87% | 6% | Very high |
| May | 75% | 6% | Low |
| June | 76% | 6% | Very high |
| July | 83% | 6% | Very high |
| August | 76% | 6% | Very high |
| September | 69% | 5% | Very high |
| October | 73% | 5% | Very high |
| November | 81% | 6% | Very high |
| December | 88% | 7% | Very high |
Squares with the highest reporting rate in January
| Square | Where | Share of visits | Class |
|---|---|---|---|
| D13 | Causeway Coast and Glens, Northern Ireland | 100% | Very high |
| D23 | Causeway Coast and Glens, Northern Ireland | 100% | Very high |
| D31 | Mid and East Antrim, Northern Ireland | 100% | Very high |
| H15 | Fermanagh and Omagh, Northern Ireland | 100% | Very high |
| H34 | Fermanagh and Omagh, Northern Ireland | 100% | Very high |
| H98 | Mid Ulster, Northern Ireland | 100% | Very high |
| J05 | Armagh City, Banbridge and Craigavon, Northern Ireland | 100% | Very high |
| J06 | Armagh City, Banbridge and Craigavon, Northern Ireland | 100% | Very high |
| J08 | Antrim and Newtownabbey, Northern Ireland | 100% | Very high |
| J21 | Newry, Mourne and Down, Northern Ireland | 100% | Very high |