RiverFish

Perch · Perca fluviatilis

Perch in the River Nidd

Largest measured perch: 40.1 cm

The largest perch measured in Environment Agency surveys of the River Nidd was 40.1 cm, recorded at Kirk Hammerton on 8 July 2011.

Across 422 measured perch, the median measured length was 14.7 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 Nidd.

See perch records across England →

Most recent observation13 August 2025Kirk Hammerton - Fry Survey · 270 fish
Largest measured perch
40.1 cm
Median length
14.7 cm
Fish measured
422
Survey locations
9

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
40.1 cm8 Jul 2011Kirk Hammerton127089
39.4 cm8 Jul 2011Kirk Hammerton127089
38.6 cm20 Jun 2013Nun Monkton136530
38.4 cm20 Jun 2013Kirk Hammerton136532
37.7 cm20 Jun 2013Kirk Hammerton136532
37.4 cm8 Jul 2011Kirk Hammerton127089
37.3 cm19 Jun 2013Knaresborough Bypass136534
36.5 cm12 Jul 2010Kirk Hammerton122956
36.4 cm8 Jul 2011Kirk Hammerton127089
36.4 cm12 Jul 2010Kirk Hammerton122956

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
Kirk Hammerton - Fry Survey18 Sept 199513 Aug 20255
Moor Monkton27 Jun 202217 Jul 20252
Skip Bridge22 Jun 202223 Jun 20253
Cowthorpe23 Aug 200227 Jun 202410
Ribston Park22 Aug 20023 Jul 201911
Knaresborough Bypass22 Aug 200218 Jul 201813
Nun Monkton21 Aug 200218 Jul 201711
Kirk Hammerton21 Aug 200223 Jun 201613
Goldsborough22 Jul 201522 Jul 20151

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

1995–2025

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 422 measured fish were spread across different length ranges.

Smallest
3 cm
Lower quarter
9.9 cm
Median
14.7 cm
Upper quarter
24.1 cm
Largest
40.1 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Nidd

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

Minnow Bullhead Stone loach Grayling Brown / sea trout European eel

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 →