[js1138]

Let’s cut through the semantic games and consider a “kind” of bird whose range circles the earth.

Variety A has a territory that adjoins the territory of variety B.

A can and does occasionally produce offspring with B.
B occasionally produces offspring with adjoining variety C.
C occasionally produces offspring with adjoining variety D.
D occasionally produces offspring with adjoining variety D.

Variety D has a territory that adjoins the territory of variety A, but never attempts to mate with A.

[mrjesse]

Let’s cut through the semantic games and consider a “kind” of bird whose range circles the earth.

Variety A has a territory that adjoins the territory of variety B.

A can and does occasionally produce offspring with B. B occasionally produces offspring with adjoining variety C. C occasionally produces offspring with adjoining variety D. D occasionally produces offspring with adjoining variety D.

Variety D has a territory that adjoins the territory of variety A, but never attempts to mate with A

Good to hear from you, js1138, been a while!

Aren't you just describing a ring species..?

I can't figure out what your point is, if you did indeed make one.

Like my grampa could have but probably didn't say, if a man can't make his own point he probably doesn't have one :-)

Please explain. Thanks!

-Jesse