House Martin (Delichon urbicum)Where and when to see it in the UK
Summer visitor · reporting peaks June to August · Swallows · 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.
House Martin has been recorded in 2,704 of the 2,971 10 km squares covering UK land (91%) in records to 2026. Summer visitor in the UK. Its strongest squares are in England, Scotland and Wales. Reporting peaks in June to August.
Conservation status: Least Concern (IUCN Red List, LC)
View on the IUCN Red List- Very high
- 34% or more of visits
- High
- 19% to 34%
- Moderate
- 10% to 19%
- Low
- under 10%
- 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 | 0% | <1% | Very high |
| February | 0% | <1% | Very high |
| March | 1% | <1% | Low |
| April | 35% | 9% | Low |
| May | 75% | 19% | Moderate |
| June | 91% | 23% | Very high |
| July | 94% | 24% | Very high |
| August | 100% | 25% | Very high |
| September | 78% | 20% | Very high |
| October | 15% | 4% | Low |
| November | 0% | <1% | Low |
| December | 0% | <1% | Very high |
Squares with the highest reporting rate in June
| Square | Where | Share of visits | Class |
|---|---|---|---|
| C62 | Causeway Coast and Glens, Northern Ireland | 100% | Very high |
| D00 | Mid and East Antrim, Northern Ireland | 100% | Very high |
| D20 | Mid and East Antrim, Northern Ireland | 100% | Very high |
| D24 | Causeway Coast and Glens, Northern Ireland | 100% | Very high |
| H04 | Fermanagh and Omagh, Northern Ireland | 100% | Very high |
| H06 | Fermanagh and Omagh, Northern Ireland | 100% | Very high |
| H14 | Fermanagh and Omagh, Northern Ireland | 100% | Very high |
| H25 | Fermanagh and Omagh, Northern Ireland | 100% | Very high |
| H32 | Fermanagh and Omagh, Northern Ireland | 100% | Very high |
| H34 | Fermanagh and Omagh, Northern Ireland | 100% | Very high |