Category: hoarfrost

Winter has Tetlin National Wildlife Refuge in …

Winter has Tetlin National Wildlife Refuge in its icy grip. For countless generations, the Upper Tanana Valley of Alaska has served as a natural travel corridor – for wildlife, native people and explorers. Despite the blanket of snow, many animals live here year round – including the Great Grey Owl, which preys on small rodents. Photo by U.S. Fish and Wildlife Service.

Take a walk through a winter wonderland at Yel…

Take a walk through a winter wonderland at Yellowstone National Park. While it looks a light coating of snow at Tangled Creek, the landscape is covered in hoar frost, which forms when water vapor freezes quickly creating delicate, feather-like crystals. Photo by Jacob W. Frank, National Park Service.