Beavers, boar and wild horses
Natural England and the Wildwood Trust aim to restore the Stodmarsh national nature reserve in Kent's Stour valley to its state 7,000 years ago. It's a fairly challenging goal. They have brought in boar, beaver and the descendants of the horse which roamed Britain in prehistoric times to help.
The small wild horses are fond of weeds. Their grazing helps to preserve the native grassland and thereby the "rare species of plant, invertebrates and birds spotted at Stodmarsh. . .including the corn bunting, the shining ram's horn snail and the carnivorous plant greater bladderwort".
I like the idea of being able to look through the window of nature into the ancient past.
Speaking of bladderwort, Robert Byron wrote a wonderful poem about the flora and fauna of England.