It may not look like much but this is one of the world's rarest birds.
Sillem's mountain finch was first spotted in Aksai Chin, Xinjiang, by Dutch ornithologist Jerome Sillem in 1929. It was not seen again until this June, when another was snapped by a French nature photographer, Yann Muzika, in the Yenigou valley, Qinghai, 1,500 kilometres away.
Writing on his blog, Yann revealed that he 'did not venture into the upper reaches of Yenigou Valley... with any scientific goal, and it was not a birdwatching nor a photography expedition either'. He added: "It was just a trek with 2 friends, that was about to fail since Bertrand and myself were struggling hard with a food poisoning.