A Chameleon Does Change its Colours, But How is It?
How does a chameleon change its colours. It changes from bright green to a grey-black or to yellow spot. Did nature give the chameleon an automatic colour changing arrangement, so that it would resemble the background wherever it goes.
There is a strange fact about its ability to change its colours. It is not caused by the colour of its surroundings. The chameleon pays no attention there to.
The chameleon’s skin is transparent. Underneath the skin, there are layers of cells which contain yellow, blue and red colouring matter. When the cells contract or expand, we see a change in the colour of the chameleon.
But what makes these cells to work. When the chameleon becomes angry or frightened, its nervous system sends messages to those cells. Anger cause change in colour to darken excitement and fright bring paler shades and yellow spots.
Sunlight also affects the chameleon colours. Hot sunlight will make those cells turn dark or almost black. High temperature without Sunlight normally produce green colours, low temperature produces green colours. And darkness makes the chameleon change to a cream colour with yellow spots.
We see different things like emotion, temperature, and light cause the nervous system of the chameleon to make its colour cells perform their tricks, and not the colour of its surroundings.
It does happen, that these changes in colour help the chameleon become almost invisible to its enemies like birds and snakes. And the chameleon is such a slow-moving animal, it needs this kind of protection to save its life.