When the cold descends on Iceland, whooper swans migrate south to the Scottish Highlands
Spiders love drystone walls, and the Peak District has 100s of miles of limestone walls.
Chris Sperring travels to the Somerset Levels in search of great crested newts.
Sian Griffiths heads to the Algonquin Park in Canada to listen out for Eastern wolves.
Chris Sperring is in Somerset during the last days of summer, listening for nightjars.
Tim Birkhead looks at the guillemots of Skomer Island that have been studied for 42 years.
The green hairstreak butterfly is making a comeback in the Pentland Hills.
Tom Heap meets the critically endangered rock iguana of the Caribbean.
Tom Heap joins a night safari in search of the Caicos pygmy boa constrictor.
Trai Anfield is in Dorset to find a bee that builds its nest in empty snail shells.