Comedian Bill Bailey talks about his passion for nature and his new birdwatching television show - with a competitive edge. We look at the RSPB's Letter to the Future campaign which seeks political backing to save and protect the environment so that our grandchildren will be able to share their world with sparrows and polar bears, eagles and tigers. There's information about how you can add your signature to it.  Plus this month's great moment with nature takes place in a back garden with a festive covering of snow...but it's not robins or reindeer that the RSPB's Ciaran Nelson is celebrating!