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.

Cumbria and Lancashire

River Calder

Survey sites
73
Survey events
299
Recorded taxa
27
Evidence period
21 May 1984 – 2 Oct 2025
Sites latest within 2 years
6
Sites latest over 10 years ago
45
EA waterbody IDs
GB104027062620 · GB104027062630 · GB104027062641 · GB104027062642 · +10 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

22 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 troutRiver Calder 66River Kennet 47Latest evidence 2 Oct 2025 · 14 Oct 2025
  2. ChubRiver Calder 24River Kennet 41Latest evidence 14 Aug 2025 · 9 Oct 2025
  3. PerchRiver Calder 20River Kennet 38Latest evidence 14 Aug 2025 · 9 Oct 2025
  4. PikeRiver Calder 10River Kennet 47Latest evidence 24 Jun 2024 · 9 Oct 2025
  5. RoachRiver Calder 20River Kennet 36Latest evidence 14 Aug 2025 · 8 Oct 2025
  6. DaceRiver Calder 14River Kennet 41Latest evidence 14 Aug 2025 · 9 Oct 2025
  7. GudgeonRiver Calder 23River Kennet 31Latest evidence 14 Aug 2025 · 1 Oct 2025
  8. European eelRiver Calder 28River Kennet 9Latest evidence 29 Aug 2025 · 8 Nov 2013
  9. Atlantic salmonRiver Calder 21River Kennet 14Latest evidence 30 Sept 2025 · 25 Oct 2010
  10. GraylingRiver Calder 11River Kennet 21Latest evidence 29 Aug 2025 · 9 Oct 2025
  11. BarbelRiver Calder 10River Kennet 22Latest evidence 15 Aug 2024 · 25 Sept 2025
  12. BullheadRiver Calder 17River Kennet 11Latest evidence 2 Oct 2025 · 14 Oct 2025
  13. BleakRiver Calder 1River Kennet 27Latest evidence 24 Jun 2024 · 25 Sept 2025
  14. Stone loachRiver Calder 15River Kennet 8Latest evidence 14 Aug 2025 · 8 Oct 2025
  15. Common breamRiver Calder 4River Kennet 19Latest evidence 4 Jul 2012 · 25 Sept 2025
  16. MinnowRiver Calder 11River Kennet 11Latest evidence 14 Aug 2025 · 14 Oct 2025
  17. 3-spined sticklebackRiver Calder 12River Kennet 4Latest evidence 2 Oct 2025 · 14 Oct 2025
  18. European eels > elversRiver Calder 11River Kennet 5Latest evidence 30 Sept 2025 · 10 Oct 2025
  19. Roach x common bream hybridRiver Calder 1River Kennet 12Latest evidence 4 Jul 2012 · 25 Oct 2018
  20. RuffeRiver Calder 1River Kennet 9Latest evidence 27 Jul 1999 · 5 Nov 2022
  21. Pike varietiesRiver Calder 3River Kennet 5Latest evidence 20 Sept 2007 · 1 Oct 2025
  22. Common carp varietiesRiver Calder 2River Kennet 3Latest evidence 23 Apr 1985 · 22 Oct 2015

Only in the River Calder survey set

  1. European elvers3 sites · latest 31 Aug 2023
  2. 10-spined stickleback1 site · latest 18 Aug 2014
  3. Brown / sea trout x salmon hybrid1 site · latest 24 Jun 2024
  4. Chub x dace hybrid1 site · latest 11 Jul 2003
  5. Orfe / Ide1 site · latest 11 Jul 2002

Only in the River Kennet survey set

  1. Tench13 sites · latest 13 Nov 2024
  2. Rainbow trout8 sites · latest 8 Oct 2024
  3. Brook lamprey7 sites · latest 14 Oct 2025
  4. Common [wild] carp5 sites · latest 24 Oct 2018
  5. Mirror carp4 sites · latest 4 Nov 2008
  6. Rudd3 sites · latest 4 Nov 2022
  7. Silver bream3 sites · latest 4 Nov 2022
  8. Brook lamprey > ammocoete1 site · latest 6 Oct 2023
  9. 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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