One of the curious things in the world of birds is why most species come in only one color form, while others come in many. We can start with the western tanager. Adult males all look the same. Adult ...

Have you ever wondered why some people have lighter eyes than others? Differences in iris coloration have traditionally been explained as a result of sexual selection, but a recent study led by ...

The analysis of visual color and color variation is an important exercise for numerous markets and industries. Here, we describe in detail protocols and optimal practices for dependable and sturdy ...