Silver-backed chevrotain, or mouse-deer, thought extinct, caught on camera in Vietnam

With so many stories of animals going extinct these days it's rare to get some good news.

But researchers working in lowland forest near Nha Trang in south-east Vietnam have captured the first-ever photos of a silver-backed chevrotain or "mouse-deer", which conservationists feared was extinct.

Key points:

• Silver-backed chevrotain not seen since the 1990s, only known from dead specimens

• They appear to be abundant in small patch of forest

• Good news welcome for 'depressed' conservationists

Read more here.