Image for Olm - a rather strange animal

Olm - a rather strange animal

Duration: 01:31

Filmed in Krka National Park, Croatia. To reach olms you dive into huge underground caves.

Available since: Sat 3 Nov 2012

This clip is from

Natural World 2012-2013, Attenborough's Ark: Natural World Special

5/10 David Attenborough picks ten animals that he would most like to save from extinction.

First broadcast: 09 Nov 2012

Image for Attenborough's Ark: Natural World Special Not currently available on BBC iPlayer

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