The State of Maine is blessed with ferns called fiidldeheads or ostrich fern (Matteuccia struthiopteris).Nearly all ferns have fiddleheads, but those of the ostrich fern are unlike any other. Ostrich fern fiddleheads, which are about an inch in diameter, can be identified by the brown papery scale-like covering on the uncoiled fern, as well as the smooth fern stem, and the deep āUā-shaped groove on the inside of the fern stem. Look for ostrich ferns emerging in clusters of about three to twelve fiddleheads each on the banks of rivers, streams, and brooks in late April, May, and early June. Make sure that you have landowner permission before harvesting fiddleheads.