A fyrefly is a 2" (5cm)-long flying insect that flickers with flame at night.
The Cormanthor fyreflies gather in massive swarms on clear summer evenings, and this causes scorching and damage to the foliage in the area. This continues until the morning light arrives and they dissipate.
If there is an extremely clear night in the Cormanthor forest, the fyreflies will confuse the highly visible stars with an invasion of rival fyreflies, and go into a frenzy, causing extensive damage and igniting many fires.
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