Tonight, Nick Baker is chasing snow fleas and investigating mysterious blobs in the countryside. Soundman Gary Moore is talking winter birdsong and Euan McIlwraith is there with a roundup of what's been appearing on the Winterwatch cameras all week.

Nick Baker hosts Winterwatch Unsprung - the show that's led by the audience with quizzes, questions, anecdotes and mayhem! Nick is joined by Chris, Michaela and Martin, who answer your conundrums, take a look at your photos and films, and share your experiences of this winter.

Tonight's theme is 'sounds of the season'. Plus Nick Baker takes a closer look at winter down the lens. He will be dissecting galls and examining a range of mystery objects sent in by viewers. Also including backstage moments from behind the scenes of Winterwatch.

Join naturalist Nick Baker, who is sharing the sofa with live owls and a knitted deer! Euan McIlwraith will be checking for pine martens live on the Winterwatch cameras, and both will be answering your questions, showing your photos and sharing your experiences of winter.