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Re: Livezey and Zusi's big bird morph analysis [...]

Who will make the sacrifice and buy the book with the data matrix? :-)

What really makes me raise an eyebrow is that Livezey and Zusi not
only find a grebe/loon clade, but also a owl/falconiform clade

This one, however, is also found by the last few molecular analyses, as well as by Mayr taking *Messelastur* and the like into account.

a falconiform clade including cathartids

What's so bad about that one?