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Why scientists are counting seal pups in the Thames Estuary
By Helen Briggs
BBC News
29 June 2018
Sixty years ago the Thames Estuary was regarded as "biologically dead" and largely devoid of wildlife.
But, in recent years seals have returned to the Thames as well as to the coastal and low-lying lands bordering the estuary.
Last year, scientists recorded more than 3,500 harbour and grey seals.
Now, they are starting the first count of seal pups to see how important the area is a breeding ground.
More:
https://www.bbc.com/news/science-environment-44647967