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Elephantbird
Eggs |
by Curtis C. Ebbesmeyer
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A foot-long egg you say?
No way!
It’s true, I say!!
Big enough to hold
8 ostrich eggs or
180 chicken eggs or
12,000 hummingbird eggs.
by Curtis C. Ebbesmeyer
“I wonder whether I could tax the thinking of your Alert
membership on the subject of the Giant Elephantbird of Madagascar,
whose eggs appear to have floated from Madagascar
across the Indian Ocean to the west coast of Australia,” writes
John Hawkins of J.B. Hawkins Antiques, New South Wales,
Australia.
Across the 500-mile-wide Mozambique Channel, Madagascar
stretches 1,000 miles along Africa’s southeast coast
facing the Indian Ocean. Earth’s fourth largest island, Madagascar
after Greenland, New Guinea and Borneo, once was
home to the Giant Elephantbird, the largest ever to tread Earth.
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Elephantbird (Illustration
adapted from “Vanished Species” by
David Day,Gallery Books, 1989 revision.)
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Aepyornis maximus (Greek
for greatest tall bird) males stood 10 feet tall, weighed one ton — two
to four times the weight of a present-day ostrich — and laid
watermelon-sized eggs, larger than any of known dinosaurs.
The ratite family of gigantic flightless birds includes four
extinct species — Giant Elephantbird of Madagascar, and the
Slender Moa, Greater Broad-billed Moa and Lesser
Megalapteryx all from the South Island of New Zealand, and
seven surviving species — Rhea of South America, three species
of Kiwi of New Zealand, the Emu and Cassowary of Australia
and New Guinea, and the Ostrich of South Africa.
From a million to perhaps 2,000 years ago their population
increased to huge numbers, explaining why as many as
50 egg sherds per square yard litter some southern Madagascar beaches.
Human settlement beginning about the time of
Christ apparently decimated the great flocks. A few probably
lingered on in remote areas till the end of the seventeenth century.
As Madagascans say, the Elephantine birds laid Atodim
bobombe. One of 43 known complete bobombes, John’s holds six
liters and measures a foot long by eight inches wide. A
larger one measuring three feet around, contained 9-plus liters
(>2.4 gallons). Another, more than foot long, originally
weighed 20-plus pounds, equal to eight ostrich eggs. The
average ostrich egg weighs 3.63 to 3.88 pounds,
measures 6 to 8 inches long and 4 to 6 inches
wide, and can support the weight of a 252-
pound person, according to the 1977
Guinness Book of World Records.
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Elephantbirds buried their eggs
in beach, dune and river sands. “
There is a fairly extensive literature
on eggs floating out of nests
in marshes or on beaches when
high water comes up,” writes
bird authority John Dennis. In
southern Madagascar, torrential
rains washed out a whole egg
and laid it to rest intact beneath
a bush on a grassy plain (see National
Geographic, October
1967).
As John Dennis alludes, river
floods and ocean tides may have
floated bobombes out to sea. Rains
fall heavily in Madagascar December
to April, the likely time eggs began drifting.
Though fossilized calcium carbonate
shells appear heavy, hollow foot-long eggs like
John’s — sherds crack with the sound of porcelain —
would float high in sea water like empty pottery jars.
Other possibilities exist for flotation. In the time humans
hunted Aepyornis to extinction, tribes probably discovered uses
for the great eggs. |
Drift of Elephantbird
Eggs (Map by
Jim Ingraham)
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A Kalahari Desert tribe
in Africa makes ostrich eggs into water
storage containers by poking a hole for
extracting the contents. Perhaps, some early Madagascans
sealed Aepyornis eggs which later drifted about the Indian
Ocean.
Along the southwestern Australian coast within a hundred
miles of Perth, John Hawkins confirms that two elephantine
eggs were discovered, one presently in the Perth
Museum. The East Madagascar Current which
sweeps the southeastern and southern Madagascar
shores might have transported hollow
elephantbird eggs to the southwest
toward South Africa. Then the South
Indian Ocean Current could have
transported them to western Australia,
a 6,000 mile journey lasting
approximately two years.
John Dennis reports that a hollow
ostrich egg floats very high
in sea water. High windage
might’ve shortened the journeys
of Aepyornis eggs to a
year.
If they do float for substantial
periods of time, some from
southern Madagascar should
have washed up in South Africa,
and others from the north end of
the island could go northward to the
Maldive Islands. Please report giant
egg shell sherds — as well as messagebearing
bottles launched near Madagascar —
recovered anywhere about the Indian
Ocean. (Information from “The Giant Elephant Bird,” by
John Hawkins, p. 83, The Australian Antique Collector. Thanks
to John Dennis for assistance and Eric Noah for the story of
the Kalahari tribe.) |
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