AnglerRadar / Compare rivers 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
Survey sites 6
Survey events 26
Recorded taxa 23
Evidence period 13 Jun 2000 – 10 Oct 2024
Sites latest within 2 years 0
Sites latest over 10 years ago 0
EA waterbody IDs GB106039023030 · GB106039023480
Access status Not established by survey data Thames
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
19 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.
Pike Duke of Northumberland 4 River Kennet 47 Latest evidence 10 Oct 2024 · 9 Oct 2025 Chub Duke of Northumberland 6 River Kennet 41 Latest evidence 10 Oct 2024 · 9 Oct 2025 Dace Duke of Northumberland 6 River Kennet 41 Latest evidence 10 Oct 2024 · 9 Oct 2025 Roach Duke of Northumberland 6 River Kennet 36 Latest evidence 10 Oct 2024 · 8 Oct 2025 Perch Duke of Northumberland 2 River Kennet 38 Latest evidence 19 Oct 2023 · 9 Oct 2025 Gudgeon Duke of Northumberland 6 River Kennet 31 Latest evidence 10 Oct 2024 · 1 Oct 2025 Bleak Duke of Northumberland 3 River Kennet 27 Latest evidence 19 Oct 2023 · 25 Sept 2025 Common bream Duke of Northumberland 3 River Kennet 19 Latest evidence 19 Oct 2023 · 25 Sept 2025 Tench Duke of Northumberland 2 River Kennet 13 Latest evidence 8 Oct 2024 · 13 Nov 2024 Minnow Duke of Northumberland 3 River Kennet 11 Latest evidence 10 Oct 2024 · 14 Oct 2025 Bullhead Duke of Northumberland 1 River Kennet 11 Latest evidence 10 Oct 2024 · 14 Oct 2025 European eel Duke of Northumberland 2 River Kennet 9 Latest evidence 1 Nov 2010 · 8 Nov 2013 European eels > elvers Duke of Northumberland 5 River Kennet 5 Latest evidence 10 Oct 2024 · 10 Oct 2025 Stone loach Duke of Northumberland 2 River Kennet 8 Latest evidence 10 Oct 2024 · 8 Oct 2025 Pike varieties Duke of Northumberland 2 River Kennet 5 Latest evidence 6 Oct 2010 · 1 Oct 2025 3-spined stickleback Duke of Northumberland 2 River Kennet 4 Latest evidence 10 Oct 2024 · 14 Oct 2025 Common [wild] carp Duke of Northumberland 1 River Kennet 5 Latest evidence 15 Jun 2000 · 24 Oct 2018 Rudd Duke of Northumberland 2 River Kennet 3 Latest evidence 10 Oct 2024 · 4 Nov 2022 Silver bream Duke of Northumberland 1 River Kennet 3 Latest evidence 10 Oct 2024 · 4 Nov 2022 Only in the Duke of Northumberland survey set Tench varieties 2 sites · latest 6 Oct 2010 European elvers 1 site · latest 11 Oct 2016 Feral [brown] goldfish 1 site · latest 13 Jun 2000 Roach x rudd hybrid 1 site · latest 13 Jun 2000 Only in the River Kennet survey set Brown / sea trout 47 sites · latest 14 Oct 2025 Barbel 22 sites · latest 25 Sept 2025 Grayling 21 sites · latest 9 Oct 2025 Atlantic salmon 14 sites · latest 25 Oct 2010 Roach x common bream hybrid 12 sites · latest 25 Oct 2018 Ruffe 9 sites · latest 5 Nov 2022 Rainbow trout 8 sites · latest 8 Oct 2024 Brook lamprey 7 sites · latest 14 Oct 2025 Mirror carp 4 sites · latest 4 Nov 2008 Common carp varieties 3 sites · latest 22 Oct 2015 Brook lamprey > ammocoete 1 site · latest 6 Oct 2023 Golden goldfish 1 site · latest 12 Nov 2009 Method and boundary
Comparison, not prediction. Source Environment Agency Ecology & Fish Data Licence Open Government Licence v3.0 Source copy retrieved 23 Jul 2026 Coordinates Not published on this page Not asserted Access, current presence, abundance, catch prospects or safety