Pterosaurs — extinct, flying reptiles known only from fossils — are often thought to have been covered in scales or naked skin. In actuality, fossil evidence shows that these creatures had a kind of fuzz covering their bodies called pycnofibres. Recently, some researchers have claimed that pycnofibres are actually a type of feather and that this has bearing on the evolution of birds. In this article, we will explore the evidence for pycnofibres, whether pycnofibres are feathers, and how a young-earth creationist should think through this topic.