This video says about itself:
From the BBC:
Madagascar birds burst into song
Rarely-heard recordings of birdsong from the biodiversity hotspot of Madagascar have been compiled and released by the British Library.
Conservationists prize the island for its unique species, notably lemurs.
But deforestation and destruction of other habitats is taking many towards the brink of extinction.
Most of the bird recordings have never before been published.
The call of the red-shouldered vanga was recorded in 1997 on the occasion of the species’ first reported observation in the wild.
The British Library Sound Archive compiled its CD with the environment group Conservation International which is heavily involved in projects aiming to conserve Madagascar’s unique biological legacy.