ARAnglerRadar evidence & rules

Colne fishing evidence · Hertfordshire and North London

What fish are in the Colne (Hertfordshire and North London)?

Monitoring has recorded 31 species across 37 surveyed sites on this water, between 1986 and 2026. These are survey records with dates. They do not establish what is present today, that the water is fishable, or that you have permission to fish it.

River evidence passport

Four signals, kept deliberately separate.

The passport shows identity, survey breadth, evidence freshness and trip constraints without turning unlike facts into an opaque “best river” score.

01 · Identity

Colne (Hertfordshire and North London)

EA ecology area
Hertfordshire and North London
Waterbody IDs
GB106039023010 · GB106039023090 · GB106039029820 · GB106039029840 · GB106039029850
Catchments
Colne
02 · Survey breadth

37 sites · 168 events

31 positive taxa aggregates are shown. More survey coverage is not a fishing-quality verdict.

03 · Freshness by site

Latest 15 Jun 2026

Within 2 years
6 sites
3–5 years
3 sites
6–10 years
4 sites
Older
24 sites

Recorded species

What monitoring has found here

Ordered by how many sites on this water recorded the species. A species not listed has not been recorded by these surveys — which is not the same as being absent.

  1. ChubLeuciscus cephalus34 siteslatest 15 Jun 2026
  2. PerchPerca fluviatilis34 siteslatest 15 Jun 2026
  3. RoachRutilus rutilus32 siteslatest 15 Jun 2026
  4. DaceLeuciscus leuciscus29 siteslatest 15 Jun 2026
  5. GudgeonGobio gobio29 siteslatest 15 Jun 2026
  6. European eelAnguilla anguilla20 siteslatest 12 Jun 2017
  7. Pike varietiesEsox lucius20 siteslatest 23 May 2023
  8. PikeEsox lucius18 siteslatest 14 May 2026
  9. BleakAlburnus alburnus15 siteslatest 4 Jul 2024
  10. BullheadCottus gobio15 siteslatest 15 Jun 2026
  11. Common breamAbramis brama15 siteslatest 24 Jul 2025
  12. BarbelBarbus barbus12 siteslatest 15 Jun 2026
  13. Brown / sea troutSalmo trutta10 siteslatest 15 Jun 2026
  14. European eels > elversAnguilla anguilla8 siteslatest 15 Jun 2026
  15. MinnowPhoxinus phoxinus8 siteslatest 15 Jun 2026
  16. Roach x common bream hybridRutilus rutilus x Abramis brama8 siteslatest 12 Jun 2017
  17. 3-spined sticklebackGasterosteus aculeatus7 siteslatest 24 Jul 2025
  18. TenchTinca tinca5 siteslatest 12 Jun 2025
  19. Tench varietiesTinca tinca5 siteslatest 5 Jul 2017
  20. RuffeGymnocephalus cernuus4 siteslatest 1 Aug 2022
  21. Silver breamAbramis bjoerkna4 siteslatest 27 Jun 2024
  22. Common [wild] carpCyprinus carpio3 siteslatest 24 Sept 2013
  23. Mirror carpCyprinus carpio3 siteslatest 20 Jun 2024
  24. GraylingThymallus thymallus2 siteslatest 28 May 2009
  25. Stone loachBarbatula barbatula2 siteslatest 22 Jul 2025
  26. 10-spined sticklebackPungitius pungitius1 sitelatest 16 Apr 2026
  27. Bleak x roach hybridAlburnus alburnus x Rutilus rutilus1 sitelatest 20 May 2015
  28. Brook lampreyLampetra planeri1 sitelatest 30 May 2012
  29. Common carp varietiesCyprinus carpio1 sitelatest 20 May 2010
  30. Roach x silver bream hybridRutilus rutilus x Abramis bjoerkna1 sitelatest 22 Nov 2001
  31. RuddScardinius erythrophthalmus1 sitelatest 24 Jul 2012

Surveyed sites on this water

37 shown, newest survey first

Provenance

Source and licence

  • SourceEnvironment Agency Ecology & Fish Data
  • LicenceOpen Government Licence v3.0
  • Source copy retrieved23 Jul 2026
  • Waterbody nameAs published by the Environment Agency
  • Not assertedCurrent presence, access, permission, fishing quality or safety
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