RiverFish

3-spined stickleback · Gasterosteus aculeatus

3-spined stickleback in the River Old Windsor

Largest measured 3-spined stickleback: 4.3 cm

The largest 3-spined stickleback measured in Environment Agency surveys of the River Old Windsor was 4.3 cm, recorded at Old Windsor Upstream Fry on 24 August 2011.

Across 81 measured 3-spined stickleback, the median measured length was 3.2 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 Old Windsor.

See 3-spined stickleback records across England →

Most recent observation3 September 2025Old Windsor Upstream Fry · 21 fish
Largest measured 3-spined stickleback
4.3 cm
Median length
3.2 cm
Fish measured
81
Survey locations
2

Individual EA measurements

Largest measured 3-spined stickleback

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

LengthSurvey dateSurvey locationSurvey ID
4.3 cm24 Aug 2011Old Windsor Upstream Fry130089
4.1 cm24 Aug 2011Old Windsor Upstream Fry130089
4.1 cm24 Aug 2011Old Windsor Upstream Fry130089
4 cm24 Aug 2011Old Windsor Upstream Fry130089
3.9 cm24 Aug 2011Old Windsor Upstream Fry130089
3.9 cm24 Aug 2011Old Windsor Upstream Fry130089
3.9 cm24 Aug 2011Old Windsor Upstream Fry130089
3.9 cm19 Aug 2009Old Windsor Upstream Fry120797
3.8 cm29 Aug 2013Old Windsor Downstream Fry138584
3.8 cm24 Aug 2011Old Windsor Upstream Fry130089

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

Explore the river

Where 3-spined stickleback were found

Each point marks a survey location with at least one 3-spined stickleback 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 3-spined stickleback
Old Windsor Upstream Fry20 Aug 20083 Sept 202511
Old Windsor Downstream Fry20 Sept 20063 Sept 20257

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

2006–2025

Survey records by year

Each bar shows how many survey visits recorded 3-spined stickleback that year.

Fish measured by surveyors

Measured length distribution

See how the 81 measured fish were spread across different length ranges.

Smallest
1.8 cm
Lower quarter
2.8 cm
Median
3.2 cm
Upper quarter
3.6 cm
Largest
4.3 cm

Lengths are direct survey measurements rather than anglers’ catches.

More fish in this river

Explore the River Old Windsor

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

Dace Gudgeon Chub Roach Minnow Bleak

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 →