RiverFish

Rudd · Scardinius erythrophthalmus

Rudd in the River Colne

Largest measured rudd: 26.9 cm

The largest rudd measured in Environment Agency surveys of the River Colne was 26.9 cm, recorded at Nunnery Bridge on 29 November 1990.

Across 143 measured rudd, the median measured length was 11.6 cm.

RiverFish uses Environment Agency survey measurements rather than rod-and-line angling records. These figures show fish measured during EA surveys of the River Colne.

See rudd records across England →

Most recent observation2 June 2026Wakes Colne Viaduct · 1 fish
Largest measured rudd
26.9 cm
Median length
11.6 cm
Fish measured
143
Survey locations
22

Individual EA measurements

Largest measured rudd

The largest individual measurements in this river and species dataset. Equal measurements are retained as separate surveyed fish.

LengthSurvey dateSurvey locationSurvey ID
26.9 cm29 Nov 1990Nunnery Bridge13946
24.3 cm20 Sept 1990Poole Street13947
23.9 cm23 May 2005Fordstreet85820
23.2 cm25 Sept 1987Nunnery Bridge13921
21.5 cm22 Sept 1987The Hedinghams13920
20.9 cm25 Sept 1987Nunnery Bridge13921
20.6 cm25 Sept 1987Nunnery Bridge13921
20.5 cm25 Sept 1987Nunnery Bridge13921
20 cm25 Sept 1987Nunnery Bridge13921
19.8 cm8 Sept 1987Maplestead Mill13918

Lengths are direct survey measurements. RiverFish does not estimate fish weights from length.

Explore the river

Where rudd were found

Each point marks a survey location with at least one rudd record.

Choose a point on the map to see what was recorded there.

Map points are approximate and don’t show fishing access. Check local permissions before visiting.

Place surveyedFirst recordedLast recordedVisits finding rudd
Wakes Colne Viaduct1 May 20032 Jun 20265
Brook Street Farm10 Sept 19878 Jun 20174
Earls Colne FGS14 May 200431 May 20178
Cooks Mill25 Apr 199624 May 20172
Cricket Ground28 Jul 198730 Apr 20148
Spring Lane15 May 200928 Apr 20142
Downstream New Bridge29 Jun 201129 Jun 20111
Chalkney Mill23 May 200824 May 20112
North Bridge17 Apr 199614 May 20093
The Hedinghams22 Sept 198716 Jun 20083
Earls Colne Mill17 Aug 19876 Jun 20083
Fiddlers Mill2 Jun 20082 Jun 20081
Fordstreet30 Apr 199620 May 20083
Castle Park23 May 19847 May 20083
Swanscombe Farm27 May 200527 May 20051
Alderford Mill15 Jun 199916 Jul 20022
Maplestead Mill8 Sept 19878 Jul 20023
Broom House29 Apr 199928 Jun 20022
Box Mill27 Jun 200227 Jun 20021
Bathing Pool13 Aug 199313 Aug 19931
Nunnery Bridge25 Sept 198729 Nov 19902
Poole Street20 Sept 199020 Sept 19901

Choose a point or table row to see the location. More survey visits can mean more records, but not necessarily more fish.

1984–2026

Survey records by year

Each bar shows how many survey visits recorded rudd that year.

Fish measured by surveyors

Measured length distribution

See how the 143 measured fish were spread across different length ranges.

Smallest
4.5 cm
Lower quarter
9 cm
Median
11.6 cm
Upper quarter
14.1 cm
Largest
26.9 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Colne

Compare other species with enough survey and measurement data for a detailed page.

Roach European eel Gudgeon Dace Pike Perch

Before you fish

Good to know

These are past survey records, so the fish present today may be different. Map points are approximate—check local access, permissions and fishing rules before visiting.

Learn how RiverFish uses the data →