Her sub-species was formally declared extinct over 80 years ago.

It is rare for animals to reappear after being declared extinct.

It was officially declared extinct in 1952 by the Indian government.

International standards at the time stated that an animal could not be declared extinct until 50 years had passed without a confirmed record.

Its song was last heard in 1987 and it has since been declared extinct.

The species was declared extinct on October 5, 2011.

By 1829, with the death of Shanawdithit, the people were officially declared extinct.

She heard that the tribe was declared officially extinct in the 1970's, when the state wanted to make the reservation into a park.

The species was officially declared extinct in 2010, 25 years after the last confirmed sighting.

But by 1870 they were declared extinct by the state.