Here's the breakdown:
* Koala fur is usually grey or brown. This is their natural coloration.
* The color can appear different due to the fur's texture and density. Some koalas have thicker, more dense fur which can appear darker, while others have thinner, finer fur that appears lighter.
* Sunlight and environment can also affect how the fur looks. Koalas in areas with more sunlight might appear more faded or bleached.
There are no "color variations" in koalas like there are in other animals, like birds or fish.
So, while it might seem like some koalas are different colors, it's just a matter of their fur and how it reflects light.