While butterflies sip nectar from flowers, they also sip any urine that has collected on the flowers and leaves any chance they get. Urine is a butterfly's best source of vitamins.

Octopi change colours when they become frightened. Normally they are a brownish colour, but can change to green or blue when fear sets in.

In Bhutan government policy is based on Gross National Happiness; thus most street advertising is banned, as are tobacco and plastic bags.

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