In the Reserve I have sometimes come upon the iguanas, the big lizards, as they were sunning themselves upon a flat stone in a river-bed. They are not pretty in shape, but nothing can be imagined more beautiful than their colouring. They shine like a heap of precious stones or like a pane cut out of an old church window. When, as you approach, they swish away, there is a flash of azure, green, and purple over the stones; the colour seems to be standing behind them in the air, like a comet’s luminous tail.
– Out of Africa, Karen Blixen