Following is a transcript of the video. Narrator: Real eiderdown is one of the warmest natural fibers you can find, but it doesn't come cheap. And an eiderdown double duvet could cost you over $8,000.

Here are eight bird species who lay colourful and eye catching eggs. The American Robin is known for its striking blue eggs. The robin’s eggs are often speckled with darker flecks, adding an extra ...

The eider, twice as heavy as a mallard, is Europe’s biggest duck. On leaving the nest, the female covers her eggs in down plucked from her breast. The grey fluffy material is a ‘gold standard ...