What turned you on to biology? I grew up amongst the wildlife of the West of England, and when I encountered an inspiring biology teacher, John Keylock, he introduced me to bird-watching and ecology. This included the systematic recording of winter wildfowl movements, and my first published observations were of bird numbers on seasonally flooded Somerset Levels. Finding errors in school biology...

A decade ago Sites and Marshall [1] described the empirical practice of species delimitation as “a Renaissance issue in systematic biology”. At the time there was an odd disconnect be‐ tween the two frequently stated empirical goals systematic biology: the discovery of: (1) monophyletic groups (clades) and relationships within these at all hierarchical levels above species; and (2) lineages (sp...