ARAnglerRadar evidence & rules

Compare river fishing evidence · England

Same facts.
No winner score.

Choose two named waters and compare the evidence that actually exists. Survey effort, species records and freshness are shown separately because none proves access, current presence or fishing quality.

Hertfordshire and North London

Colne (Hertfordshire and North London)

Survey sites
37
Survey events
168
Recorded taxa
31
Evidence period
11 Feb 1986 – 15 Jun 2026
Sites latest within 2 years
6
Sites latest over 10 years ago
24
EA waterbody IDs
GB106039023010 · GB106039023090 · GB106039029820 · GB106039029840 · +1 more
Access status
Not established by survey data
Thames

River Kennet

Survey sites
56
Survey events
264
Recorded taxa
31
Evidence period
28 Sept 1999 – 14 Oct 2025
Sites latest within 2 years
16
Sites latest over 10 years ago
31
EA waterbody IDs
GB106039017420 · GB106039023120 · GB106039023140 · GB106039023172
Access status
Not established by survey data

Overlap

27 recorded taxa appear in both survey sets

The site counts are shown per water. A higher count can reflect more monitoring sites, not a larger or healthier population.

  1. ChubColne (Hertfordshire and North London) 34River Kennet 41Latest evidence 15 Jun 2026 · 9 Oct 2025
  2. PerchColne (Hertfordshire and North London) 34River Kennet 38Latest evidence 15 Jun 2026 · 9 Oct 2025
  3. DaceColne (Hertfordshire and North London) 29River Kennet 41Latest evidence 15 Jun 2026 · 9 Oct 2025
  4. RoachColne (Hertfordshire and North London) 32River Kennet 36Latest evidence 15 Jun 2026 · 8 Oct 2025
  5. PikeColne (Hertfordshire and North London) 18River Kennet 47Latest evidence 14 May 2026 · 9 Oct 2025
  6. GudgeonColne (Hertfordshire and North London) 29River Kennet 31Latest evidence 15 Jun 2026 · 1 Oct 2025
  7. Brown / sea troutColne (Hertfordshire and North London) 10River Kennet 47Latest evidence 15 Jun 2026 · 14 Oct 2025
  8. BleakColne (Hertfordshire and North London) 15River Kennet 27Latest evidence 4 Jul 2024 · 25 Sept 2025
  9. Common breamColne (Hertfordshire and North London) 15River Kennet 19Latest evidence 24 Jul 2025 · 25 Sept 2025
  10. BarbelColne (Hertfordshire and North London) 12River Kennet 22Latest evidence 15 Jun 2026 · 25 Sept 2025
  11. European eelColne (Hertfordshire and North London) 20River Kennet 9Latest evidence 12 Jun 2017 · 8 Nov 2013
  12. BullheadColne (Hertfordshire and North London) 15River Kennet 11Latest evidence 15 Jun 2026 · 14 Oct 2025
  13. Pike varietiesColne (Hertfordshire and North London) 20River Kennet 5Latest evidence 23 May 2023 · 1 Oct 2025
  14. GraylingColne (Hertfordshire and North London) 2River Kennet 21Latest evidence 28 May 2009 · 9 Oct 2025
  15. Roach x common bream hybridColne (Hertfordshire and North London) 8River Kennet 12Latest evidence 12 Jun 2017 · 25 Oct 2018
  16. MinnowColne (Hertfordshire and North London) 8River Kennet 11Latest evidence 15 Jun 2026 · 14 Oct 2025
  17. TenchColne (Hertfordshire and North London) 5River Kennet 13Latest evidence 12 Jun 2025 · 13 Nov 2024
  18. European eels > elversColne (Hertfordshire and North London) 8River Kennet 5Latest evidence 15 Jun 2026 · 10 Oct 2025
  19. RuffeColne (Hertfordshire and North London) 4River Kennet 9Latest evidence 1 Aug 2022 · 5 Nov 2022
  20. 3-spined sticklebackColne (Hertfordshire and North London) 7River Kennet 4Latest evidence 24 Jul 2025 · 14 Oct 2025
  21. Stone loachColne (Hertfordshire and North London) 2River Kennet 8Latest evidence 22 Jul 2025 · 8 Oct 2025
  22. Common [wild] carpColne (Hertfordshire and North London) 3River Kennet 5Latest evidence 24 Sept 2013 · 24 Oct 2018
  23. Brook lampreyColne (Hertfordshire and North London) 1River Kennet 7Latest evidence 30 May 2012 · 14 Oct 2025
  24. Silver breamColne (Hertfordshire and North London) 4River Kennet 3Latest evidence 27 Jun 2024 · 4 Nov 2022
  25. Mirror carpColne (Hertfordshire and North London) 3River Kennet 4Latest evidence 20 Jun 2024 · 4 Nov 2008
  26. Common carp varietiesColne (Hertfordshire and North London) 1River Kennet 3Latest evidence 20 May 2010 · 22 Oct 2015
  27. RuddColne (Hertfordshire and North London) 1River Kennet 3Latest evidence 24 Jul 2012 · 4 Nov 2022

Only in the Colne (Hertfordshire and North London) survey set

  1. Tench varieties5 sites · latest 5 Jul 2017
  2. 10-spined stickleback1 site · latest 16 Apr 2026
  3. Bleak x roach hybrid1 site · latest 20 May 2015
  4. Roach x silver bream hybrid1 site · latest 22 Nov 2001

Only in the River Kennet survey set

  1. Atlantic salmon14 sites · latest 25 Oct 2010
  2. Rainbow trout8 sites · latest 8 Oct 2024
  3. Brook lamprey > ammocoete1 site · latest 6 Oct 2023
  4. Golden goldfish1 site · latest 12 Nov 2009

Method and boundary

Comparison, not prediction.

  • SourceEnvironment Agency Ecology & Fish Data
  • LicenceOpen Government Licence v3.0
  • Source copy retrieved23 Jul 2026
  • CoordinatesNot published on this page
  • Not assertedAccess, current presence, abundance, catch prospects or safety
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