Circadian plasticity evolves through regulatory changes in a neuropeptide gene - Nature
Briefly

Behavioral plasticity allows animals to adjust their actions to changing environments, a crucial adaptation for species like Drosophila, which modify their circadian rhythms based on seasonal light changes.
Circadian activity is vital, coordinating behaviors with optimal times for food availability, and any disruptions can lead to negative impacts on species fitness and persistence.
Read at Nature
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