Discover the rituals performed in the animal kingdom for love, life and death. Did you know painted wolves sing to vote for the next alpha couple? Neither did we. This behaviour was documented for the first time ever by the crew working on BBC Earth’s latest landmark. We explore the weird, and occasionally dark, acts that characterise crow funerals, how birds brandish themselves to potential mates and the awe-inspiring tale of witnessing a mass-baptism at the Blue Nile – a river steeped in myth and legend