Autumnwatch returns for a celebration of UK wildlife.

Chris Packham and Kate Humble visit Strangford Lough in Northern Ireland - more than 50 square miles of inland seawater, described as one of Europe's most important wildlife sites. For Chris, the star attraction is 30,000 light-bellied Brent geese - that's three quarters of the world's population. Kate decides to go deeper, diving beneath the waves in search of conger eels.

In Northumberland, wildlife sound recordist Chris Watson is on an audio journey from source to sea of the river Coquet. Closer to home Martin Hughes-Games is on the trail of the best of your stories.

Autumnwatch returns for a celebration of UK wildlife.

Chris and Kate are in the New Forest to enjoy the full splendour of autumn. By late October, the mix of yellow, brown and red leaves paints a stunning picture and on the woodland floor, fungi glow in an even broader palette of colours. Of all the woodland creatures, badgers are a firm favourite of Chris's, whilst Kate is in for a treat when she visits a bat roost.

In Scotland, Gordon Buchanan is on the Orkney Islands to check in on this year's grey seal pups, and closer to home Martin Hughes-Games is on the trail of the best of your stories.

Autumnwatch returns for a celebration of UK wildlife.

Chris and Martin visit the west coast of Scotland to catch up with the sea eagles of Mull. Since their reintroduction, some 35 years ago, the eagles have proved to be a real conservation success story.

Aboard a sea kayak, Martin also explores Mull's coastline - home to otters, seals and eider ducks. On Dartmoor, Nick Baker takes us on his own journey into the world of an oak tree and on the Somerset Levels there's news of another comeback - cranes, living wild for the first time in nearly 400 years.

Autumnwatch returns for a celebration of UK wildlife.

The team stays close to home, visiting some of the UK's 16 million back gardens to find out why they can be such an important sanctuary for wildlife in autumn. Kate learns what a garden needs to best help wildlife through the winter months while Chris passes on his own top tips.

Martin discovers there's a pecking order amongst the birds on our feeders and that some of our blackbirds are German.

Off the coast of Devon marine conservationist Maya Plass reveals autumn colour on the sea bed.