George the Pinta Island tortoise and Martha the passenger pigeon achieved fame as 'endlings’ - the last individuals of their species. Their passing is tragic, but can their fate perhaps help us to protect other threatened species? 
In this final episode of Season 4, Brit interviews Dr. Alexander Lees, from Manchester Metropolitan University in the UK, who has been working on Amazonian conservation issues for more than 20 years and has a particular interest in birdlife. Brit also hears from Joanna Lilley,  a poet who uses verse to capture the beauty and tragedy of endlings.
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