Giraffes are never exactly similar, so it is logical to think that their dress is, in itself, a sign of recognition between individuals, their large size and their visual acuity allowing them to distinguish each other at great distances and therefore to avoid or meet one another. The number of drawings with its variants is quite limited, depending on the extension of brown spots and the distance separating them. Two types of melanin, eumelanin and phaenomelanin, tint hair in black or yellow.