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Re: Kansas bird size

Dear Jeff, 
For birds in general, you can't do better than Kevin Padian and Luis M.
Chiappe's up to date "The Origin and early evolution of birds" Biol Rev
(1998) 73 pp 1-42. Extensive bibliography-- six 8 by 11 double column
pages of fine print. In more specific reply to your question, Fig 21
Hesperornis lists skull as 25cm. Fig 22 Icthyornis ("poorly known")
lists skull at 7 cm. 
Good luck,  
George J. Leonard
Prof. of Interdisciplinary Humanities
San Francisco State University