Mark,
I do not understand why a subspecies should not exist in the same habitat, area,
locale, or whatever as the parent species. The very finches you talk about on
the Galapagos exist side by side; species to subspecies. Some interbreeding
goes on but for the most part each group selects within its own group. Each
group tends to exploit a different niche within the environment. So while they
may live side by side; they eat different seeds, nest in different areas, etc.
What do you think?
Tom Eichhorst in New Mexico, USA