F884748db645b6e54d55511e62b14621

Robert
Katz

Guest Writer
Eggs thought to belong to the giant bird Genyornis were likely laid by a much smaller extinct bird from another branch of the family tree.
Australia as we know it is a land of extreme oddities. From ubiquitous marsupials to bizarre reptiles and families of birds found nowhere else on earth, the “island” continent is home to the most unique fauna on the planet. Prehistoric Australia was just as bizarre, and populated with even more strange beasts. Among these were some of the largest birds to ever live.

These were the dromornithids (“running birds”), colloquially known as mihirungs, after a legendary giant emu of Aboriginal folklore. Despite their superficial resemblance to emus and other large, flightless running birds, recent studies classify the dromornithids as being most closely related to waterfowl – earning the colorful nickname, the “demon ducks of doom.”

Because dromornithids lived so recently – until only 50,000 years ago, when they would have coexisted with humans – there is a fair amount of fossilized material with which their general biology can be determined. Throughout the sandy Australian dunes, numerous eggshell fragments have been recovered from what were thought of to be one species of dromornithid, Genyornis newtoni . These eggshell fragments were found in association with the shells of modern emu eggs, and it appears both were common between 300,000 and 100,000 years ago, nesting throughout the continent in the warm sand.