A femur bone from the extinct bird the dodo has been sold at auction for £3,800.
It was part of a sale called Out Of The Ordinary held by Sworders Fine Art Auctioneers of Stansted Mountfitchet in Essex.
The leg bone had been expected to fetch between £2,000 and £3,000. The bird became extinct in the 1680s.
The buyer has not been revealed, but there is a ban on exporting dodo bones from the UK.
An auction house spokesman said: "The story of the dodo is particularly important as it demonstrates one of the first occasions that man realised that human actions alone caused a species to die out."
The dodo was related to the pigeon family and lived solely on the island of Mauritius in the Indian Ocean, east of Madagascar.
The flightless bird had no natural predators, and adapted to living life on the ground until the Dutch colonised the island, starting in the 16th Century.
At this point dodos became hunted for sport.
Colonisation also brought new species to the island, such as rats, dogs, cats and pigs, which all contributed to the dodo's decline.
The sale also included a "FeeJee [sic] mermaid" which is a hoax stuffed creature made in the Victorian era - half monkey, half fish - purportedly from Fiji, hence the name.
It sold for £4,700 having also exceeded its estimate of £1,000 - 1,500.