A hiker made a rare discovery during a winter walk in Washington's Skagit County woods.

Instagram user netbossg snapped this photo of the mysterious looking "hair ice" during a hike near his home.

"I was out walking our new puppy in the woods when I found this on the ground. It is frost! I had to do a double take, because all the frost had melted … except for this little twig in the shade of the trees. It looks like cotton candy. "

I was out walking our new puppy in the woods when I found this on the ground. It is frost! I had to do a double take, because all the frost had melted … except for this little twig in the shade of the trees. It looks like cotton candy. #king5seattle #frost #frosty #frost #skagitvalley #skagitvalley #skagitcounty #skagitvalleytulipfestival #skagittulipfestival #wildsights #wildlifephotography #wildlife #visitskagitvalley #king5 #everythingwashington #everythingskagit #bestofnorthwest #bestofwashington

A photo posted by @netbossg on

"Hair ice" is formed when an unusual type of cold-tolerant fungus grows on dead wood in the freezing temps. LiveScience.com gives a great explanation of how "hair ice" is formed and the famous scientist who studied it.