What is a source of Fiddleheads?

Fiddleheads are the young, coiled fronds of certain ferns, most commonly the ostrich fern (Matteuccia struthiopteris). They typically emerge in the spring and are found in damp, wooded areas or along riverbanks. Fiddleheads are foraged for their unique flavor and are considered a delicacy in various cuisines. However, they should be cooked before consumption, as raw fiddleheads can be toxic.