You are studying an isolated population of birds that are morphologically distinct from other populations of their species. Female birds of this population will not breed with males from other populations when they are artificially brought into contact. You do detailed DNA analyses and find no differences between your focal population and the rest of the species. Based on this information, which of the following concepts would identify your focal population as a unique species?
A. Biological species concept
B. Morphological species concept
C. Evolutionary species concept
D. Both A and B
E. A, B and C
Follow up Q: Do you think your focal population is a unique species? Why or why not?