Ostriches are a type of bird species, and one of the 12 species of flightless birds. They lived in the jungle wildlife of Africa.
During the 2012 apocalypse, some ostriches were taken to board the Arks, then placed into the Zoology chamber, so they can survive the apocalypse, along with other animal species and more than 400,000 humans on board the Arks, saving them from extinction. The remaining other ostrich species that weren't picked up were killed in the catastrophic earthquakes, volcanic eruptions and tsunamis worlwide.
When the apocalypse ended, time was reset to year one and the 2012 survivors (humans and animals) set sail for the risen continent of Africa so they can remake their life and rebuild their species.