Page last updated at 01:55 GMT, Wednesday, 19 November 2008
Rare penguin took over from rival  The wing bones of the two
penguin species differ in size The yellow eyed penguin is bigger
than its extinct relative  The arrival of humans in New Zealand
may have led to the extinction of one penguin species - to the
advantage of another.  Writing in the Royal Society journal
Proceedings B, researchers say the extinct species lived in
areas now home to New Zealand's rare yellow eyed penguin.  The
extinction is thought to have occurred as recently as 500 years
ago.  Early settlers wiped out many of New Zealand's unique
animal species.  Scientists from the University of Otago, New
Zealand, say they discovered the new species unintentionally
when researching the genetic history of the yellow eyed penguin.
Although there are only around 7,000 yellow eyed penguins they
have a wide range, being found on the sub Antarctic Campbell and
Auckland islands as well as 700 km (435 miles) further north on
the South-East coast o