The Dodo is a flightless bird that was endemic to the island of Mauritius, east of Madagascar in the Indian Ocean. The dodo's closest genetic relative was the also-extinct Rodrigues solitaire, the two forming the subfamily Raphinae of the family of pigeons and doves.
In the Series 4 episode "New Arrivals", a small flock of Dodo came through the portal from Late Holocene Madagascar, 400 years ago after the portal somehow opened.