All Around Dudley's Bird Table

The brand new book in the prize winning series - 'All Around Dudley's Bird Table' tells the tale of Jenny Wren, Billy & Betty Bluetit, Robin, Mr Magpie, the Sparkly Starlings and all their feathered friends, negotiating the wintry weather in Dudley's Garden...

Who is that singing?  What is there to be be happy about in the middle of winter?  They have to find out...