Wander around the woods very long and you will see some weird markings. They may be blue, red, yellow, orange, white, green, black or even pink, and are always on the bark of trees. Are our forests invaded by aliens? Is this Sasquatch’s way of communicating? Do the colors have some other meaning?

It turns out that the odd markings we see in the forests are intentional markings from land management agencies, primarily U.S. Forest Service, Bureau of Land Management and state of Idaho Department of Lands. These colors are used to mark areas that are to be harvested, and each color has a specific meaning to the foresters and harvest crews.

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