British Wildlife Wiki
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Bird urine (a whitish fluid) and faeces are usually mixed together as droppings. Birds which do not produce any pellets, get rid of any indigestible food such as seeds or berries in their droppings. There are 3 types of droppings:

  1. Liquid
  2. Round, semi-firm
  3. Long, firm
    Ptarmigan Excretion

    Ptarmingan Droppings - http://www.flickr.com/photos/qwertyqwertyqwerty/

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