River Old Windsor
14 fish species have been recorded at 2 locations along the River Old Windsor.
- Fish species
- 14
- Places surveyed
- 2
- Survey visits
- 33
- Records span
- 2004–2025
Local EA evidence
Where fish were recorded
Choose a point on the map to see what was recorded there.
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River conditions
Environment Agency evidence
Fish found in this river
Open a linked fish for detailed measurements, or use the map filter above to compare survey locations.
| Fish | Sites | Most recent | Fish counted | Measured length | Measured weight |
|---|---|---|---|---|---|
| DaceLeuciscus leuciscus | 2 | 2025 | 6,409 | Median: 5.1 cm1,805 fish measuredLargest measured dace: 14.1 cm | — |
| GudgeonGobio gobio | 2 | 2025 | 13,486 | Median: 3.9 cm2,502 fish measuredLargest measured gudgeon: 12 cm | — |
| ChubLeuciscus cephalus | 2 | 2025 | 5,843 | Median: 3.5 cm1,910 fish measuredLargest measured chub: 43.3 cm | — |
| RoachRutilus rutilus | 2 | 2025 | 7,120 | Median: 4.2 cm1,872 fish measuredLargest measured roach: 17.4 cm | — |
| MinnowPhoxinus phoxinus | 2 | 2025 | 19,657 | Median: 3 cm2,067 fish measuredLargest measured minnow: 7 cm | — |
| BleakAlburnus alburnus | 2 | 2025 | 4,844 | Median: 3 cm1,103 fish measuredLargest measured bleak: 14.1 cm | — |
| 3-spined sticklebackGasterosteus aculeatus | 2 | 2025 | 265 | Median: 3.2 cm81 fish measuredLargest measured 3-spined stickleback: 4.3 cm | — |
| PerchPerca fluviatilis | 2 | 2025 | 258 | Median: 7 cm108 fish measuredLargest measured perch: 14.7 cm | — |
| BarbelBarbus barbus | 2 | 2025 | 175 | Median: 4.5 cm58 fish measuredLargest measured barbel: 6.7 cm | — |
| Common breamAbramis brama | 2 | 2018 | 216 | Median: 2.7 cm202 fish measuredLargest measured common bream: 13.2 cm | — |
| BullheadCottus gobio | 2 | 2017 | 71 | Median: 4.6 cm9 fish measuredLargest measured bullhead: 6.7 cm | — |
| TenchTinca tinca | 2 | 2017 | 18 | Median: 2.5 cm6 fish measuredLargest measured tench: 4.3 cm | — |
| RuffeGymnocephalus cernuus | 2 | 2010 | 13 | Median: 5.1 cm2 fish measuredLargest measured ruffe: 5.1 cm | — |
| PikeEsox lucius | 1 | 2006 | 4 | Median: 20.8 cm4 fish measuredLargest measured pike: 21.7 cm | — |
EA surveys have recorded these fish at particular sites and times. Absence from a survey is not evidence that a species is absent from the river. Every valid individual length and weight is retained, with its sample size shown.
Useful context
This page follows survey locations along the main River Old Windsor. Tributaries and unrelated rivers with similar names are kept separate.
The map shows past fish records, not fishing access or a promise of what you’ll catch today.
How RiverFish handles the data →