Charities and private landowners are working on the scheme covering more than 1,000 hectares.
Nearly 800 volunteers took part in the project, also creating bug hotels, Vhari Russell says.
The children in Devon spend a day planting willow, alder, and aspen trees along a river bank.
Three Sussex cows will be free to roam across the site for the first time in over half a century.
Eastbrookend Country Park will become home to the borough's newest residents.
A 20-year ecological review at the Knepp estate in West Sussex shows soaring numbers of birds.
Campaigners say the region offers good habitat for the species, but farmers and crofters have raised concerns.
Chip and Willow replace Woody and Twiggy who escaped from Mapperton Estate in 2024.
The money will be spent on breeding thousands of frogs and managing their release in 2026.
