The mushi are said to become uneasy during an eclipse. Tanyu sends Ginko to monitor a village for the appearance of a mushi that causes a neverending eclipse. Her foreboding is justified when the village is enveloped in darkness...
just because they can't 
be in the sunlight.
لعدم مقدرتهم على الشعور بالشمس
nur weil kein Sonnenlicht da ist.
solo perché non possono 
stare alla luce del sole.
só porque não conseguem receber a luz do sol.