If it was that of the struthious birds, how did the pterodactyles and carinate birds independently arrive at the very same divergent structure?
"On the Genesis of Species" by St. George Mivart
But besides this general evidence we have direct proof that the struthious birds had a wider range in past times than now.
"Island Life" by Alfred Russel Wallace
The first would serve to account for the few exceptional Struthious birds of the modern world.
"The Chain of Life in Geological Time" by Sir J. William Dawson
The wings of struthious birds differ from those of the Carinatae, just described, in many ways.
"Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 2" by Various
The first announcement of the former existence of large Struthious birds in New Zealand was made by Mr. J. S. Polack in 1838.
"Trees. A Woodland Notebook" by Herbert Maxwell