A hunt for the world's most elusive bees leads Dave Goulson from Poland to Patagonia as well as closer to home, amongst the secret places hidden right under our noses: the abandoned industrial estates where great crested newts roam; or the rewilded estate at Knepp Castle, where, with the aid of some hairy, bluebell-eating Tamworth pigs, nightingale song has been heard for the first time in generations.
Whether he is tracking great yellow bumblebees in the Hebrides or chasing orchid bee