New sightings of Scottish wildcats in the Highlands
25 April 2012 Last updated at 16:36 BST
A few years ago it was thought only 400 Scottish wildcats were left in the wild.
In fact, the wildcat is so endangered it's rarer than the Bengal Tiger.
But now scientists have found new packs of cats living in the Highlands of Scotland.
Leah has been tracking their story in her Wild 5 series, watch this new report to find out more.