When it is recorded
Jan68
Feb61
Mar294
Apr370
May495
Jun123
Jul181
Aug229
Sep415
Oct494
Nov453
Dec163
GBIF records by month, 2000–2025 (all years combined).
Where it is recorded
| # | County | Nation | Records | Share |
|---|---|---|---|---|
| 1 | Cambridgeshire | England | 404 | |
| 2 | Lincolnshire | England | 342 | |
| 3 | Norfolk | England | 300 | |
| 4 | Northamptonshire | England | 158 | |
| 5 | Fermanagh and Omagh | Northern Ireland | 130 | |
| 6 | North Lincolnshire | England | 112 | |
| 7 | Rutland | England | 109 | |
| 8 | Peterborough | England | 98 | |
| 9 | Oxfordshire | England | 97 | |
| 10 | Surrey | England | 94 | |
| 11 | Gloucestershire | England | 74 | |
| 12 | Cheshire East | England | 72 | |
| 13 | Leeds | England | 59 | |
| 14 | East Riding of Yorkshire | England | 50 | |
| 15 | Kent | England | 45 |
3,106 England5 Scotland56 Wales117 Northern Ireland
Records per county (GADM level 2) and per nation; one record can count towards several areas. 52 counties in all.
About this species
- Records since 2000
- 3,352
- Peak month
- May
- Counties with records
- 52
- IUCN Red List
- Least Concern
- Scientific name
- Dreissena polymorpha
- Group
- Molluscs
- NBN Atlas records since 2000
- 2,873
- Most recorded in
- Cambridgeshire, Lincolnshire, Norfolk, Northamptonshire, Fermanagh and Omagh, North Lincolnshire, Rutland, Peterborough, Oxfordshire, Surrey, Gloucestershire, Cheshire East +2
- Conservation designations
- GB Red List (2001 IUCN criteria)
- Kingdom
- Animalia
- Phylum
- Mollusca
- Class
- Bivalvia
- Order
- Myida
- Family
- Dreissenidae
- Genus
- Dreissena
- Name with authority
- Dreissena polymorpha (Pallas, 1771)
- Described
- 1771
- Contributing datasets
- 20
Sources: GBIF occurrence data (CC0 / CC BY), JNCC Taxon Designations (OGL), NBN Atlas (open licences), Wikidata (CC0) · Wikidata Q752130 · GBIF 2287072