Eggs-treme: Christie's auctions super-sized egg

It's a foot long, nearly nine inches in diameter, and would once have made a really, really, big omelet.

A London auction house is hoping buyers will be scrambling to take a crack at this natural wonder, a massive fossilized egg laid long ago on the island of Madagascar by a now-extinct elephant bird.

Christie's said Wednesday that the oversized ovum - laid sometime before elephant birds were wiped out several hundred years ago - is expected to sell for up to 30,000 pounds (roughly $45,000).

Flightless, fruit-gobbling elephant birds resembled giant ostriches and could grow to be 11 feet high (3.4 meters). Christie's says their eggs are 100 times the size of an average chicken's.

The egg is being sold during a travel and science sale on April 24.

Enlargephoto

Christie's scientific specialist James Hyslop poses for photographs with a sub-fossilized pre-17th century Elephant Bird egg at the auction house's premises in London, Wednesday, March 27, 2013. The egg, which is estimated to fetch 20,000 to 30,000 pounds ($30,210 to $45,315 and 23,645 to 35,467 euro) in the forthcoming Travel, Science and Natural History sale on April 24, measures over 100 times the average size of a chicken egg, and stands at 21cm in diameter and 30cm in height. The extinct Elephant Bird species was native to Madagascar and among the heaviest known birds. (AP Photo/Matt Dunham)