Elephant Bird Egg from the extinct family, Aepyornithidae. Provenance: Collected by a geologist in the early 60s when he was on a geologic survey expedition in Madagascar was bought in the local market were these eggs are often found for sale, and brought back to Canada. The geologist who brought this egg into Canada in the early 60, sold the egg to Perry Steinhilber around 1979. Elephant birds were large to enormous, flightless birds that once lived on the island of Madagascar. They became extinct, probably in the 17th or 18th century, for reasons that are unclear, although human activity is the suspected cause. The elephant bird was among the heaviest of birds.