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Otter spotting 🦦 with Jo Pearse

Learning to spot otter slides and spraint (poo) along the Taunton-Bridgwater canal and finding out more about them from Jo Pearse of the Somerset Otter Group. 


A photo of otter spraint

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The good news is we saw several fresh spraints which vary considerably in form, from what looks like a blackish bird splat to a much more formed tube. Shiny! Because of an oily anal jelly (undefined) which helps protect the otters gut from fish bones. Their poo smells, counterintuitively and even bizarrely, like fresh hay! I mean, what does that say about an otter’s microbiome?

A photo of otter spraint

We also saw an otter path which headed straight over a field and railway line from the river to a distant rhyne (drainage ditch) which the otters use as byways.

A photo of some otter spraint
A photo of Jo Pearse of the Somerset Otter Group on the Taunton-Bridgwater canal near some otter spraint

The bad news is that otters are in serious peril. A large percentage of them get run over. To navigate their increasingly barriered habitat they have to cross roads, even the M5! Apparently the offset measures like tunnels are just not funded any more.

Plus, unsurprisingly, pollution. Toxicity builds up in apex predators like otters and because they live in the water courses they get probably the worst of it.

A clipping of a news story: "The data, plotted on Watershed's pollution map, shows that many animals have been found to contain much higher levels, particularly in predators higher up the food chain. Otters were found with levels as high as 9,962ug/kg, harbour porpoises with 2,420ug/kg, grey seals with up to 357ug/kg and dolphins up to 78ug/kg. Gannet eggs had levels up to 158ug/kg and buzzard livers had up to 104ug/kg."
A clipping of a news story: "An environmental quality standard for PFOS states that no fish should have more than 9 micrograms per kilogram (9.1ug/kg) in their tissue, to protect top predators and people who consume the fish from bioaccumulating PFAS in their systems, but 12% of the fish in the datasets exceed the threshold, with some such as flounder and roach as high as 34ug/kg and 41ug/kg respectively."
A news headline that reads "Otters among UK wildlife carrying toxic forever chemicals' analysis shows"