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
Roc (mythology) pygmy hippopotamuses. Another possible origin of the myth is accounts of eggs of another extinct Malagasy bird, the enormous "Aepyornis" elephant bird, hunted to extinction by the 16th century, that was three meters tall and flightless. There were reported elephant bird sightings at least in folklore memory as Étienne de Flacourt wrote in 1658. Its egg, live or subfossilised, was known as early as 1420, when sailors to the Cape of Good Hope found eggs of the roc, according to a caption in the 1456 Fra Mauro map of the world, which says that the roc "carries away an elephant