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

Chess

Survey sites
19
Survey events
61
Recorded taxa
26
Evidence period
24 Nov 1987 – 7 Oct 2025
Sites latest within 2 years
4
Sites latest over 10 years ago
13
EA waterbody IDs
GB106039029870
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. Brown / sea troutChess 19River Kennet 47Latest evidence 7 Oct 2025 · 14 Oct 2025
  2. ChubChess 4River Kennet 41Latest evidence 23 Sept 2025 · 9 Oct 2025
  3. DaceChess 2River Kennet 41Latest evidence 23 Sept 2025 · 9 Oct 2025
  4. PerchChess 4River Kennet 38Latest evidence 26 Apr 2022 · 9 Oct 2025
  5. RoachChess 4River Kennet 36Latest evidence 23 Sept 2025 · 8 Oct 2025
  6. GudgeonChess 5River Kennet 31Latest evidence 23 Sept 2025 · 1 Oct 2025
  7. GraylingChess 7River Kennet 21Latest evidence 7 Oct 2025 · 9 Oct 2025
  8. BullheadChess 14River Kennet 11Latest evidence 7 Oct 2025 · 14 Oct 2025
  9. Stone loachChess 13River Kennet 8Latest evidence 7 Oct 2025 · 8 Oct 2025
  10. MinnowChess 10River Kennet 11Latest evidence 7 Oct 2025 · 14 Oct 2025
  11. Atlantic salmonChess 6River Kennet 14Latest evidence 15 Dec 1987 · 25 Oct 2010
  12. European eelChess 4River Kennet 9Latest evidence 21 Sept 2012 · 8 Nov 2013
  13. 3-spined sticklebackChess 8River Kennet 4Latest evidence 7 Oct 2025 · 14 Oct 2025
  14. Rainbow troutChess 4River Kennet 8Latest evidence 20 Sept 2017 · 8 Oct 2024
  15. European eels > elversChess 3River Kennet 5Latest evidence 22 Sept 2022 · 10 Oct 2025
  16. Brook lampreyChess 1River Kennet 7Latest evidence 12 May 2011 · 14 Oct 2025
  17. Common carp varietiesChess 1River Kennet 3Latest evidence 16 May 2007 · 22 Oct 2015
  18. RuddChess 1River Kennet 3Latest evidence 25 Sept 2019 · 4 Nov 2022
  19. Brook lamprey > ammocoeteChess 1River Kennet 1Latest evidence 5 May 2005 · 6 Oct 2023
  20. Golden goldfishChess 1River Kennet 1Latest evidence 24 Sept 2015 · 12 Nov 2009

Only in the Chess survey set

  1. 10-spined stickleback4 sites · latest 7 Mar 2019
  2. Brook lamprey ammocoetes1 site · latest 9 May 2017
  3. Feral [brown] goldfish1 site · latest 24 Sept 2015
  4. Golden rudd1 site · latest 12 Sept 2008
  5. Koi carp1 site · latest 14 Jul 2004
  6. Lamprey sp. ammocoetes1 site · latest 27 Apr 2006

Only in the River Kennet survey set

  1. Pike47 sites · latest 9 Oct 2025
  2. Bleak27 sites · latest 25 Sept 2025
  3. Barbel22 sites · latest 25 Sept 2025
  4. Common bream19 sites · latest 25 Sept 2025
  5. Tench13 sites · latest 13 Nov 2024
  6. Roach x common bream hybrid12 sites · latest 25 Oct 2018
  7. Ruffe9 sites · latest 5 Nov 2022
  8. Common [wild] carp5 sites · latest 24 Oct 2018
  9. Pike varieties5 sites · latest 1 Oct 2025
  10. Mirror carp4 sites · latest 4 Nov 2008
  11. Silver bream3 sites · latest 4 Nov 2022

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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