In the past, some of the more distinct color forms have been described as different species.

Like the white tiger, it is a color form and not a separate species.

Different colour forms are often observed growing near to each other.

There is some evidence that the various colour forms may in fact be different species.

So the rest of the pads, we need to go through the colour forms and everything.

There are many different colour forms, ranging from green to dark red.

The species exists in a number of different color forms or phenotypes.

Towards the end of the last chorus, Debbie's color form has returned and starts singing again.

Despite its name, the black rat exhibits several colour forms.

This species is known to have two basic color forms, a black/orange form and a green/yellow form.