An Australian research released in May identified the ancient birds that lay melon-sized eggs, whose origins remained a mystery since their shells were found in shards 40 years ago.
The six-foot-tall genyornis newtoni bird lived with ancient Australians 65,000 years ago.
The peer-reviewed research, published in PNAS, showed that humans ate the huge eggs as a protein source.
Genyornis newtoni is a "Demon duck of doom" due to its horrific look. A minority of biologists think they were carnivorous.
Researchers identified the eggs' origins by protein sequencing, excluding all other ancient Australian egg-laying megafauna.
AI was used to examine protein sequences in eggshells from two locations in southern Australia to guarantee they were accurate.