Hāpuʻu Fiddles from a hāpuʻu, or Hawaiian tree fern in Hakalau NWR Related Posts Hāpuʻu Hakalau Wildlife Refuge Open House Return to the Light Share this:TweetWhatsAppEmail Author: Andrew An electrical engineer, amateur astronomer, and diver, living and working on the island of Hawaiʻi. View all posts by Andrew