According to the Encyclopaedia Mauritiana, the dodo was extinct by 1693. This means the last one would have been sighted around that time. However, historical records regarding contact with the dodo during this time period are sketchy.

For more information on the dodo, please visit the Encyclopaedia Mauritiana website at http://www.encyclopedia.mu/.../Dodo.htm

January 20, 2009 - leaving the White House in a helicopter

she was in my bath tub eating a spider yesterday. Mum tried to flush her down the loo but I said that was mean and let her out the window instead.

"There is some controversy surrounding the extinction date of the dodo. Roberts & Solow state that "the extinction of the Dodo is commonly dated to the last confirmed sighting in 1662, reported by shipwrecked mariner Volkert Evertsz" (Evertszoon), but many other sources suggest the more conjectural date of 1681. Roberts & Solow point out that because the sighting prior to 1662 was in 1638, the dodo was likely already very rare by the 1660s, and thus a disputed report from 1674 cannot be dismissed out-of-hand. Statistical analysis of the hunting records of Isaac Johannes Lamotius give a new estimated extinction date of 1693, with a 95% confidence interval of 1688 to 1715. Considering more circumstantial evidence such as travelers' reports and the lack of good reports after 1689, it is likely that the dodo became extinct before 1700; the last Dodo died a little more than a century after the species' discovery in 1581.

Few took particular notice of the extinct bird. By the early 19th century it seemed altogether too strange a creature, and was believed by many to be a myth. With the discovery of the first batch of dodo bones in the Mare aux Songes and the reports written about them by George Clarke, government schoolmaster at Mahébourg, from 1865 on, interest in the bird was rekindled. In the same year in which Clarke started to publish his reports, the newly vindicated bird was featured as a character in Lewis Carroll's Alice's Adventures in Wonderland. With the popularity of the book, the dodo became a well-known and easily recognizable icon of extinction."
Source and further information:
http://en.wikipedia.org/wiki/Dodo

In this history book I saw, when I was in high school back in 2005.

The last bird went extinct in 1917, so that's probably when.

Well I saw a stuffed one on Wednesday at the Natural History Museum... I should have read what they said about it and I may have been able to answer the question!

think I spotted him while ago on here

When I pushed 'submit' for my answer, and I got that "Gadzooks" message!
Arrrgggh!!!!

Do'h