A celebration of the stranger birdcalls featured on Tweet of the Day
Chris Packham presents the great bustard.
David Attenborough presents the storm petrel.
Kate Humble presents the bittern.
Kate Humble presents the black grouse.
Kate Humble presents the snipe.
Kate Humble presents the little grebe.
Kate Humble presents the capercaillie.
Bill Oddie presents the black redstart.
Chris Packham presents the moorhen.
Martin Hughes-Games presents the common crane.
