This essay addresses two questions. It first asks what happens to security practices when they take species life as their referent object. It then asks what happens to security practices which take species life as their referent object when the very understanding of species life undergoes transformation and change. In the process of addressing these two questions the essay provides an exegesis of Michel Foucaultcuritpopulationheterogenesis’. This serves as the empirical referent for the recombinant biopolitics of security in the molecular age.