Many Latin names are as descriptive as these two, but some are particularly evocative. What better name for the venomous puff adder could there be than Bitis arietans (‘striking, biting thing’) – other than perhaps Lachesis muta, which belongs to the South American bushmaster and means ‘silent fate’? The Canadian porcupine goes by the perfect name of Erethizon dorsatum – ‘having an irritating back’. However, as this book will reveal at length, many scientific names are as useless as Troglodytes troglodytes troglodytes (‘hole burrower hole burrower hole burrower’, the burdensome name of the northern wren) and Puffinus puffinus, which is, of course, the name of the Manx shearwater.