Why seals are coming back to the Thames - BBC London

Описание к видео Why seals are coming back to the Thames - BBC London

The number of seals in the Thames Estuary has doubled to 3,500 since the Zoological Society of London carried out its first annual survey in 2013.

Thea Cox, from the ZSL, flew above the estuary with naturalist Mike Dilger to find out where the seals tend to concentrate.
She hailed the increase as a "positive sign of the health of the ecosystem".

BBC Inside Out Reports.

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