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The Yuan Yang

Chris Sperring goes to the River Dart in Devon to look for mandarin ducks.

• 22 mins

Coquet Terns

Coquet Island off the Northumberland coast is the last breeding site for roseate terns.

• 22 mins

Glow Worms

Chris Sperring meets Robin Scagell on a night-time safari for the enigmatic glow worm.

• 22 mins

Pine Marten

Pine martens were once persecuted to near extinction but now are making a comeback.

• 22 mins

Native Lime

Chris Sperring is in Hampshire looking at lime trees with lime tree specialist Hugh Milner

• 22 mins

Segestria Florentina

Chris Sperring searches for tube web spiders at Exeter Cathedral.

• 22 mins

The Ivy Bee

Chris Sperring meets up with Richard Comont to find out more about the ivy bee.

• 20 mins

Fairy Rings

Chris Sperring talks to fungi expert Lynne Boddy about the weird world of fairy rings.

• 22 mins

Winged Buffet

Chris Sperring joins Peter Wright and Andrew Gibson at Spurn National Nature Reserve.

• 22 mins

Barnacle Geese of Caerlaverock

Trai Anfield and Brian Morrell witness huge flocks of barnacle geese at WWT Caerlaverock.

• 22 mins

Grey Seals of Blakeney

Trai Anfield visits the grey seals at Blakeney Point on the Norfolk coast.

• 22 mins

Lepidopteran Winter

Chris Sperring goes to Dorset to see how one butterfly in particular survives the winter.

• 22 mins

A Starling Eruption

Trai Anfield witnesses the dawn eruption of starlings from the Somerset Levels.

• 22 mins

Long-Tailed Tits: The Winter Flock

Chris Sperring spends a winter's day with a long-tailed-tit family.

• 22 mins

Crossbills

Trai Anfield searches for crossbills near Sherwood Forest in Nottinghamshire.

• 22 mins

Mendip Voles

Chris Sperring searches for one of the most abundant mammals in the UK, the vole.

• 22 mins

Adders of Loch Lomond

Trai Anfield encounters adders basking on the edges of Loch Lomond.

• 22 mins

Springtime in the Hazel Coppice

Chris Sperring visits a hazel coppice awash with springtime flowers.

• 22 mins

A Shell Nesting Bee

Trai Anfield is in Dorset to find a bee that builds its nest in empty snail shells.

• 22 mins

Turks and Caicos Islands: The Pygmy Boa Constrictor

Tom Heap joins a night safari in search of the Caicos pygmy boa constrictor.

• 22 mins

Turks and Caicos Islands: The Rock Iguana

Tom Heap meets the critically endangered rock iguana of the Caribbean.

• 22 mins

Green Hairstreak

The green hairstreak butterfly is making a comeback in the Pentland Hills.

• 22 mins

Guillemots of Skomer

Tim Birkhead looks at the guillemots of Skomer Island that have been studied for 42 years.

• 22 mins

Nightjars

Chris Sperring is in Somerset during the last days of summer listening for nightjars.

• 20 mins

Calling Eastern Wolves

Sian Griffiths heads to the Algonquin Park in Canada to listen out for Eastern wolves.

• 22 mins

Great Crested Newts

Chris Sperring travels to the Somerset Levels in search of great crested newts.

• 22 mins

Drystone Walls

Spiders love drystone walls, and the Peak District has 100s of miles of limestone walls.

• 22 mins

Whooper Swans

When the cold descends on Iceland, whooper swans migrate south to the Scottish Highlands

• 22 mins

The Spined Loach

Brett Westwood heads to Cambridgeshire in search of one of Britain's rarest vertebrate.

• 22 mins

Winter Seashore

Trai Anfield finds the wildlife on the wintry shores of Devon.

• 22 mins