The DNA differences will show it.
See
http://www.blackwell-synergy.com/doi/abs/10.1111/j.1365-294X.2006.03028.x
Tim Murphy
-----Original Message-----
From:
Behalf Of Peter Shute
Sent: Wednesday, 7 February 2007 2:12 PM
To: birding-aus
Subject: Split of Rockhopper Penguin
wrote on Wednesday, 7 February 2007
12:56 PM:
> The divergence in mating signals
> found between these two taxa seems to have occurred recently
> and relatively rapidly.
Forgive my ignorance, but how do they know that?
Peter Shute
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