Polar bear carrying fish
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Birthday treats for polar bears Walker and Arktos

5 December 2012 Last updated at 16:08 GMT

Polar bears Walker and Arktos have been celebrating their birthdays at Highland Wildlife Centre, near Aviemore.

Walker is five years old and Arktos is four.

Keepers at the centre in Kingussie decided to mark their birthdays, which are a few days apart, with frozen fish treats.