Not all it seems to be

An ornamental pond not far from Oxford

An ornamental pond not far from Oxford

Here’s a classic lily and goldfish pond – not far from Oxford.

It looks like a wildlife disaster, but it has a surprisingly low conductivity – just 178, compared to the nearby river (720), and a pond next to the river (620).

The water here is pretty clean, compared to the river, and probably mostly rainwater. It’s actually only a little bit higher than the pond in my garden which is about 100 – exceptionally good for anywhere in Oxfordshire.

So this is a pond with more potential than you might at first think – but there’s not much in the way of animal or plant life at present, probably because of the goldfish and lack of habitat.

But I did find a solitary mayfly – one of the type whose adults are known as the Angler’s Curse, and to entomologists as a species of Caenis (‘ky-niss’).

These mayfly larvae are usually associated with pretty clean water.

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