A week ago I linked to an essay about the species concept, and today I direct you to another one: What do we mean by species?
It is a nice discussion of the biological and the phylogenetic species concepts, so if this is something that interests you, you should go read it.
–
256-284=-28
If you think you know the answer to this question, you should go read this entry at Scitable: Why should we care about species?
The question is especially complicated when we consider closely related species or sub-species, or when we think about the evolution of species and speciation, but this text is more on the fundamental definitions.
It is written by Jody Hey of IM fame and really worth a read.
–
249-259=-10