The work of Forestry England and the Roy Dennis Wildlife Foundation, to release white-tailed eagles on the Isle of Wight, is the subject of a new YouTube film.

It reveals some of what goes on behind the scenes, as experts work to restore an established population of the UK's largest bird of prey.

Four years into the project, the video explains what has been learned about the birds so far.

Scroll down to see the film...

Known as flying barn doors, white-tailed eagles became extinct on the south coast in 1780 - the last pair bred on Culver Cliff, which overlooks Sandown Bay.

In Scotland, a longer-running rewilding project has already helped establish over 130 breeding pairs and there are plans to release 60 birds on the Isle of Wight, establishing up to ten breeding pairs, on both sides of the Solent.

After that, wildlife teams are hoping the population will spread across England.

The white-tailed eagle, or sea eagle, has a wing span of up to 2.5 metres. 

Their wings are broader than a golden eagle and they have tips that look like fingers.

They do not get their full adult feathers - including the distinctive white tail - until they are between 4 and 5 years old.

They do not breed until they about 6 years old.

The Isle of Wight birds are tracked, using clever solar-powered technology, and the collected data is fed back to the project teams, allowing those involved to work out how the eagles are living.

Have you spotted the Isle of Wight white-tailed eagles recently?

Among the revelations so far, it has emerged the Island's eagles enjoy cuttlefish in their diet.

Described as being a bit like snails, cuttlefish are molluscs and they are common in the waters around our coast.

The video about the white-tailed eagle project was filmed on the Island and features interviews with Steve Egerton-Read, who is Forestry England's project officer and Tim Mackrill, from the Roy Dennis Wildlife Foundation.

In the most recent update from the Roy Dennis Wildlife Foundation, two territorial pairs have become established on the Isle of Wight and in the Arun valley, in West Sussex.