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The red colouration seen in the animal on the left is usually due to iron oxide deposits in the guard hairs - is this colouration common on the Tees?
OU Certificate in Contemporary Science
It wouldn't surprise me Gill as the rocks around Middlesborough are full of ironstone.
There's a famous breeding colony of common seals in the mouth of the Tees near Saltholme.
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I wondered why it was that colour but thought it was natural variation- fascinating that is is likely to be from iron oxide deposits.
And yes these seals were at Saltholme.
Lat/Lng: 54.6007, -1.2234
OS grid ref: NZ502231
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