RiverFish

Perch · Perca fluviatilis

Perch in the River Cookham - Boulters

Largest measured perch: 33 cm

The largest perch measured in Environment Agency surveys of the River Cookham - Boulters was 33 cm, recorded at Odney Weir Stream, Cookham. on 4 September 2007.

Across 222 measured perch, the median measured length was 14.6 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 Cookham - Boulters.

See perch records across England →

Most recent observation27 July 2025Cliveden Island · 1 fish
Largest measured perch
33 cm
Median length
14.6 cm
Fish measured
222
Survey locations
3

Individual EA measurements

Largest measured perch

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

LengthSurvey dateSurvey locationSurvey ID
33 cm4 Sept 2007Odney Weir Stream, Cookham.106681
25.6 cm1 Sept 2014Cliveden Island142527
25.5 cm1 Sept 2014Cliveden Island142527
25.4 cm3 Sept 2012Cliveden Island133658
25 cm4 Sept 2007Odney Weir Stream, Cookham.106681
24.1 cm2 Sept 2008Cliveden Island114322
23.8 cm10 Sept 2002Cliveden Island69061
23.4 cm5 Sept 2011Cliveden Island128096
23.1 cm2 Sept 2008Cliveden Island114322
22.9 cm2 Sept 2008Cliveden Island114322

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

Explore the river

Where perch were found

Each point marks a survey location with at least one perch 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 perch
Cliveden Island1 Sept 199827 Jul 202522
Odney Weir Stream, Cookham.1 Sept 20003 Sept 201211
Hedsor Weir Stream Cookham to Boulters1 Sept 20051 Sept 20051

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

1998–2025

Survey records by year

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

Fish measured by surveyors

Measured length distribution

See how the 222 measured fish were spread across different length ranges.

Smallest
5.8 cm
Lower quarter
12.5 cm
Median
14.6 cm
Upper quarter
17.4 cm
Largest
33 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Cookham - Boulters

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

Bleak Roach Pike European eel Dace Chub

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 →