Perch · Perca fluviatilis

Perch in the Willow Brook

Largest measured perch: 39.7 cm

The largest perch measured in Environment Agency surveys of the Willow Brook was 39.7 cm, recorded at Woodnewton on 29 May 2015.

Across 277 measured perch, the median measured length was 16 cm.

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

See perch records across England →

Most recent observation25 October 2018Walcot Lodge DS Site · 2 fish

Largest measured perch: 39.7 cm
Median length: 16 cm
Fish measured: 277
Survey locations: 10

Individual EA measurements

Largest measured perch

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

Length	Survey date	Survey location	Survey ID
39.7 cm	29 May 2015	Woodnewton	145172
37.8 cm	18 Jun 2013	Woodnewton	137450
36.8 cm	29 May 2012	Woodnewton	131351
35.8 cm	18 Jun 2013	Woodnewton	137450
35.5 cm	27 Oct 2009	Woodnewton	119992
31 cm	4 Mar 1992	Apethorpe	54454
29 cm	15 Aug 2001	Woodnewton	72898
29 cm	27 Feb 1992	Bulwick	54451
28.5 cm	8 May 2015	Apethorpe	144650
27.7 cm	8 May 2015	Apethorpe	144650

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 surveyed	First recorded	Last recorded	Visits finding perch
Walcot Lodge DS Site	25 Oct 2018	25 Oct 2018	1
Bulwick	21 Feb 1989	23 Oct 2018	10
Walcot Lodge US Site	26 May 2018	26 May 2018	1
Woodnewton	15 Feb 1989	29 May 2015	8
Apethorpe	14 Feb 1989	8 May 2015	4
Downstream Deene Lake	22 Feb 1989	1 May 2015	4
King's Cliffe	21 Feb 1989	17 Apr 2015	4
Weldon	4 Aug 1998	30 Mar 2015	2
Lodge Farm	4 Aug 1998	4 Aug 1998	1
Alder Farm	26 Feb 1992	26 Feb 1992	1

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

1989–2018

Survey records by year

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

589

090

091

692

093

094

195

096

097

698

099

000

201

002

003

004

005

106

007

008

109

010

111

212

213

014

615

016

017

318

Fish measured by surveyors

Measured length distribution

See how the 277 measured fish were spread across different length ranges.

Smallest: 4.9 cm
Lower quarter: 12.3 cm
Median: 16 cm
Upper quarter: 18.5 cm
Largest: 39.7 cm

0–99 mm

100–199 mm

193

200–299 mm

300–399 mm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the Willow Brook

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

Chub Roach Gudgeon Bullhead European eel Dace

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 →