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night. At midnight, the birds showed active wakefulness and drowsiness, while front and back sleep were significantly reduced. We also found that the birds were drowsier during day-time in migratory phase, as compared to non-migratory and pre-migratory states. This clearly suggests that the birds in migratory phase compensate for their midnight sleep
loss by being torpid during the day and by taking power naps during early and late night. Our study shows that birds, like humans also need a proper amount of sleep to maintain their well-being, but unlike us they can change their sleep distribution seasonally, which might be an important evolutionary adaptation for these migratory finches.
Ms. Jyoti Tiwari || 345