colouration BrE
coloration AmE

It has some green colouration on the side of the head.

The black and white colouration is noticeable from an early stage.

Colouration of a single fish can change during the courtship process.

Males and females both show the same range of colouration.

She used tissue paper and hand colouration to produce these pieces.

However, the general colouration may differ depending on the region.

This is its warning colouration, which it shows when attacked.

She has no blue colouration on her body and has brown eyes.

There are also behavioral changes that act in a similar way to warning colouration.

Colouration can also be used to help species recognition during mating.

It is unique in the pink colouration of the head combined with a dark body.

The colouration of the various species varies widely from green to black.

The sky took on a mixed colouration of rose, green and violet.

However, different colouration of the grass could be seen.

The red colouration may also be used by females as a way to assess male quality.

There are numerous factors that may influence colouration during glass production.

The sexes have the same colouration and are indistinguishable from each other.

When they reproduce, males take on a slight green or red colouration.

These scales are dark brown in colouration and have fragile edges.

It lacks the red phase of colouration when the flesh is cut.

There was no other explanation for the monotonous surface colouration.

Connected to their toxicity is the use of warning colouration.

Most species are dark gray, with lighter colouration on the abdomen.

The species can be distinguished by their colouration and morphology.

The male fish has a deeper body, and differs significantly in colouration.

The coloration brought out the deep blue of her eyes.

She held it up to the light but could see no coloration.

Something else might have helped as well: a different coloration.

For the first time he noticed a dark coloration on the point.

But what gave the phrase its political coloration, and when?

In some individuals the dark coloration can appear almost black.

The body coloration is blue and yellow on the back.

The little voice had taken on a dark deliberate coloration.

The common name of the whale comes from its coloration.

The young are dark in color until they begin taking on the adult coloration at the age of five months.

They differ in the coloration of the head and back.

They are difficult to spot due to their green coloration.

And several works take on a specific coloration because of their context.

How old was the female when she changed to her male coloration?

They are white, often with areas of purple coloration, or brown.

There may be a lot of people looking at the situation and putting a different coloration on it.

This material's really direct, so why add any more coloration?

It is red in coloration, and shows a black tip.

The eyes, the bill and the feet of adults are all yellow in coloration.

The basic coloration of the body is light green, with many small black spots.

The study of animal coloration was a particularly active area.

The green coloration of the two plants is also nearly identical.

They can be of different coloration or patterns from adults.

You've said that the letters page "does not have a political coloration of its own."

Although a set of them may have the same basic coloration, no two are alike.