Calciavis grandei Directory References Discover 7 of History's Most Notorious Serial Killers Why Is Ireland Two Countries? 12 Greek Gods and Goddesses Why Does Salt Melt Ice? Why Is Black History Month Celebrated in February? 9 Love Stories with Tragic Endings 9 Questions About World War II Answered Contents Calciavis grandei fossil bird Ask the Chatbot a Question Ask the Chatbot a Question Learn about this topic in these articles:evolution of ostriches In ostrich…ostriches belong to the species Calciavis grandei, which were excavated from the Green River Formation in Wyoming and date to the Eocene Epoch, some 56 million to 34 million years ago.Read More