Elephant bird process of continental drift. Claims of findings of "aepyornithid" egg remains on the eastern Canary Islands, if valid, would represent a major biogeographical enigma. These islands are not thought to have been connected to mainland Africa when elephant birds were alive. There is no indication that elephant birds evolved outside Madagascar, and today, the Canary Island eggshells are considered to belong to extinct North African birds that may not have been ratites (possibly "Eremopezus"/"Psammornis", or even Pelagornithidae, prehistoric seabirds of immense size). Various "aepyornithid-like" eggs and bones occur in Paleogene and Miocene deposits in Africa and Europe. Two whole eggs
Elephant bird to , the largest type of bird egg ever found. The egg weighed about . The egg volume is about 160 times greater than that of a chicken egg. "Aepyornis" is believed to have been more than tall and weighed perhaps in the range of . In September 2018, scientists reported that "Vorombe titan" reached weights of , and based on a fragmentary femur, possibly up to , making it the world's largest bird. Only the much older species "Dromornis stirtoni" from Australia rivals it in size among known fossil birds. In the same report, the upper weight limits for