This seems to imply that the reason we can’t see them (their flash) is because it is too bright out to see their lights during the day (when the sun is out). Most fireflies light up only when it is dark (usually/mostly at dusk or just after sunset for about 20 minutes up to several hours). Some species that fly during the day (are diurnal) do not flash.
This seems to imply that the reason we can’t see them (their flash) is because it is too bright out to see their lights during the day (when the sun is out). Most fireflies light up only when it is dark (usually/mostly at dusk or just after sunset for about 20 minutes up to several hours). Some species that fly during the day (are diurnal) do not flash.