Firefly

The firefly is a bug you catch flying near water. In the northern hemisphere look for it in Jun, from 7 PM – 4 AM. It hides when it rains. Nook's Cranny pays 300 Bells, Flick pays 450 Bells.

Glows over rivers and ponds on dry nights, but only for one month a year, so do not miss the window. It is very common while in season, so a short evening walk by the water is enough.