Elephant bird that apparently originated from Marco Polo's account of the rukh in 1298, although he was apparently referring to an eagle-like bird strong enough to "seize an elephant with its talons". Sightings of eggs of elephant birds by sailors (e.g. text on the Fra Mauro map of 1467–69, if not attributable to ostriches) could also have been erroneously attributed to a giant raptor from Madagascar. The legend of the roc could also have originated from sightings of such a giant subfossil eagle related to the African crowned eagle, which has been described in the genus "Stephanoaetus" from Madagascar, being large enough
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