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

Colnebrook

Survey sites
8
Survey events
41
Recorded taxa
22
Evidence period
13 May 1986 – 3 Jun 2025
Sites latest within 2 years
1
Sites latest over 10 years ago
6
EA waterbody IDs
GB106039023010
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

20 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. PikeColnebrook 3River Kennet 47Latest evidence 3 Jun 2025 · 9 Oct 2025
  2. ChubColnebrook 6River Kennet 41Latest evidence 3 Jun 2025 · 9 Oct 2025
  3. DaceColnebrook 5River Kennet 41Latest evidence 4 Jun 2024 · 9 Oct 2025
  4. PerchColnebrook 7River Kennet 38Latest evidence 3 Jun 2025 · 9 Oct 2025
  5. RoachColnebrook 7River Kennet 36Latest evidence 4 Jun 2024 · 8 Oct 2025
  6. GudgeonColnebrook 6River Kennet 31Latest evidence 3 Jun 2025 · 1 Oct 2025
  7. BleakColnebrook 4River Kennet 27Latest evidence 3 Jun 2015 · 25 Sept 2025
  8. BarbelColnebrook 5River Kennet 22Latest evidence 3 Jun 2025 · 25 Sept 2025
  9. Common breamColnebrook 2River Kennet 19Latest evidence 24 Apr 2010 · 25 Sept 2025
  10. European eelColnebrook 7River Kennet 9Latest evidence 14 Jun 2018 · 8 Nov 2013
  11. TenchColnebrook 3River Kennet 13Latest evidence 3 Jun 2025 · 13 Nov 2024
  12. MinnowColnebrook 2River Kennet 11Latest evidence 20 Jun 2023 · 14 Oct 2025
  13. BullheadColnebrook 1River Kennet 11Latest evidence 20 Jun 2023 · 14 Oct 2025
  14. Pike varietiesColnebrook 4River Kennet 5Latest evidence 14 Jun 2011 · 1 Oct 2025
  15. Stone loachColnebrook 1River Kennet 8Latest evidence 12 Jun 2008 · 8 Oct 2025
  16. European eels > elversColnebrook 3River Kennet 5Latest evidence 3 Jun 2025 · 10 Oct 2025
  17. Common [wild] carpColnebrook 1River Kennet 5Latest evidence 14 Aug 2002 · 24 Oct 2018
  18. Mirror carpColnebrook 1River Kennet 4Latest evidence 14 Aug 2002 · 4 Nov 2008
  19. Common carp varietiesColnebrook 1River Kennet 3Latest evidence 23 Apr 2010 · 22 Oct 2015
  20. Silver breamColnebrook 1River Kennet 3Latest evidence 24 Apr 2010 · 4 Nov 2022

Only in the Colnebrook survey set

  1. European glass eels1 site · latest 24 Apr 2010
  2. Tench varieties1 site · latest 8 Jun 2010

Only in the River Kennet survey set

  1. Brown / sea trout47 sites · latest 14 Oct 2025
  2. Grayling21 sites · latest 9 Oct 2025
  3. Atlantic salmon14 sites · latest 25 Oct 2010
  4. Roach x common bream hybrid12 sites · latest 25 Oct 2018
  5. Ruffe9 sites · latest 5 Nov 2022
  6. Rainbow trout8 sites · latest 8 Oct 2024
  7. Brook lamprey7 sites · latest 14 Oct 2025
  8. 3-spined stickleback4 sites · latest 14 Oct 2025
  9. Rudd3 sites · latest 4 Nov 2022
  10. Brook lamprey > ammocoete1 site · latest 6 Oct 2023
  11. 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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