Answer: Blact redstarts are associated with circadian clock. Seasonal melatonin and circadian clock lead to migratory nocturnal restlessness. The birds that exhibit migratory restlessness at night is due to high levels of melatonin at nights because melatonin are high in the night.
Explanation:
Migratory restlessness is the locomotive performance that birds engaged in before migration. It is common in birds with circadian rhythm.
