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The large size of elephant bird eggs means that they would have required substantial amounts of calcium, which is usually taken from a reservoir in the medullary bone in the femurs of female birds. Possible remnants of this tissue have been described from the femurs of A. maximus. [13] Aepyornis eggs, Muséum national d'Histoire naturelle, Paris
The tops of elephant bird skulls display punctuated marks, which may have been attachment sites for fleshy structures or head feathers. [18] Mullerornis is the smallest of the elephant birds, with a body mass of around 80 kilograms (180 lb), [16] with its skeleton much less robustly built than Aepyornis. [19]
Ostrich eggs in a nest on a farm. The egg of the ostrich (genus Struthio) is the largest of any living bird (being exceeded in size by those of the extinct elephant bird genus Aepyornis). The shell has a long history of use by humans as a container and for decorative artwork, including beads. The eggs are not commonly eaten.
The extinction of the elephant bird is attributed to human activity. The birds were once widespread, but deforestation and the hunting of the bird's eggs led to the species' decline. [3] Attenborough compares the factors that led to the extinction of the elephant bird with the threats facing critically endangered species in the present. [3]
The Malagasy crowned eagle (Stephanoaetus mahery), [1] also known as the Madagascar crowned hawk-eagle, is an extinct large bird of prey endemic to Madagascar.. It has been proposed that this bird, combined with elephant bird eggs, were the source of sightings of the mythical Roc.
All bird eggs contain the following components: [1] The embryo is the immature developing chick; The amnion is a membrane that initially covers the embryo and eventually fills with amniotic fluid, provides the embryo with protection against shock from movement
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Family †Aepyornithidae Bonaparte 1853 (elephant birds) Genus † Aepyornis St. Hilaire 1850 (4 species) † Aepyornis gracilis Monnier 1913 (gracile elephant bird)