An additional specimen exists (or existed), but its present whereabouts is unknown.
In 1992, 112 specimens existed in the wild, and a recovery plan was implemented.
Since the specimens no longer exist, he says, the book compensates by providing numerous pages of drawings taken from their original sources.
Same specimens exist also at the neighbouring island of Ganonggha.
A few specimens exist in bank collections, with one in private hands.
Only two stuffed specimens exist today, in Paris and Vienna.
Not more than a few specimens exist in captivity.
"I could not believe that such beautiful specimens existed," he said.
As only a few specimens exist, naturally there is little material available for genetic sampling.
Only four specimens exist, collected by Frank Wonder between 12 and 16 January 1929.