Occasionally subfossil eggs are found intact.
The National Geographic Society in Washington holds a specimen of an Aepyornis egg which was given to Luis Marden in 1967.
 The specimen is intact and contains the skeleton of the unhatched bird.
The Denver Museum of Nature and Science (Denver, Colorado) holds two intact eggs, one of which is currently on display.
Another giant Aepyornis egg is on display at the Harvard Museum of Natural History in Cambridge, MA.
A cast of the egg is preserved at the Grant Museum of Zoology at London University.

An intact specimen is also exists in Kuleli Military High School Museum, Istanbul, Turkey.

David Attenborough owned an almost complete eggshell, dating from 600 to 700 CE, which he pieced together from fragments that were given to him while making his 1961 BBC series Zoo Quest to Madagascar.
In March 2011, the BBC broadcast the 60-minute documentary Attenborough and the Giant Egg, presented by Attenborough, about his personal scientific quest to discover the secrets of the elephant bird and its egg.

A complete eggshell is also available in the collection of the University of Wrocław Museum of Natural History.

There is also an intact specimen of an elephant bird's egg (contrasted with the eggs from other bird species, including a hummingbird's) on display at the Delaware Museum of Natural History, just outside Wilmington, Delaware, US, and another in the Natural History Museum, London.

The Melbourne Museum has two Aepyornis eggs.
The first was acquired for £100 by Professor Frederick McCoy in June 1862, and is an intact example.
In 1950 it was subjected to radiological examination, which revealed no traces of embryonic material.
A second, side-blown Aepyornis egg was acquired at a later date.

The Western Foundation of Vertebrate Zoology, with one of the world's largest collections of avian eggs, has seven Aepyornis egg specimens.

A specimen is also held by the science department at Stowe School in Buckinghamshire, UK.

In the collections of the department of geology at the Field Museum of Natural History in Chicago there is a complete, side-blown egg collected, in about 1917, by Rev. Peter A. Bjelde.

A specimen of egg is also held at Regional Museum of Natural History, Bhubaneswar which was donated by former Indian Ambassador Abasar Beuria and his wife Tripti Beuria from their collection.

In April 2013 a specimen was sold at Christie's in London for £66,675 The pre-sale estimate had been "more than $45,000".

In April 2018, staff at the Buffalo Museum of Science discovered, after radiographing a giant, cream-colored egg, measuring 12 inches (300 mm) in length and 28 inches (710 mm) in circumference, and weighing over 3 pounds (1.4 kg), that had long been thought to be just a model, was actually an "elephant bird" egg.
Occasionally subfossil eggs are found intact. The National Geographic Society in Washington holds a specimen of an Aepyornis egg which was given to Luis Marden in 1967.  The specimen is intact and contains the skeleton of the unhatched bird. The Denver Museum of Nature and Science (Denver, Colorado) holds two intact eggs, one of which is currently on display. Another giant Aepyornis egg is on display at the Harvard Museum of Natural History in Cambridge, MA. A cast of the egg is preserved at the Grant Museum of Zoology at London University.
An intact specimen is also exists in Kuleli Military High School Museum, Istanbul, Turkey. 
David Attenborough owned an almost complete eggshell, dating from 600 to 700 CE, which he pieced together from fragments that were given to him while making his 1961 BBC series Zoo Quest to Madagascar. In March 2011, the BBC broadcast the 60-minute documentary Attenborough and the Giant Egg, presented by Attenborough, about his personal scientific quest to discover the secrets of the elephant bird and its egg.
A complete eggshell is also available in the collection of the University of Wrocław Museum of Natural History.
There is also an intact specimen of an elephant bird's egg (contrasted with the eggs from other bird species, including a hummingbird's) on display at the Delaware Museum of Natural History, just outside Wilmington, Delaware, US, and another in the Natural History Museum, London.
The Melbourne Museum has two Aepyornis eggs. The first was acquired for £100 by Professor Frederick McCoy in June 1862, and is an intact example. In 1950 it was subjected to radiological examination, which revealed no traces of embryonic material. A second, side-blown Aepyornis egg was acquired at a later date.
The Western Foundation of Vertebrate Zoology, with one of the world's largest collections of avian eggs, has seven Aepyornis egg specimens.
A specimen is also held by the science department at Stowe School in Buckinghamshire, UK.
In the collections of the department of geology at the Field Museum of Natural History in Chicago there is a complete, side-blown egg collected, in about 1917, by Rev. Peter A. Bjelde.
A specimen of egg is also held at Regional Museum of Natural History, Bhubaneswar which was donated by former Indian Ambassador Abasar Beuria and his wife Tripti Beuria from their collection.
In April 2013 a specimen was sold at Christie's in London for £66,675 The pre-sale estimate had been "more than $45,000".
In April 2018, staff at the Buffalo Museum of Science discovered, after radiographing a giant, cream-colored egg, measuring 12 inches (300 mm) in length and 28 inches (710 mm) in circumference, and weighing over 3 pounds (1.4 kg), that had long been thought to be just a model, was actually an "elephant bird" egg.
Elephant bird