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Figure 2 | BMC Neuroscience

Figure 2

From: Seasonal influences on sleep and executive function in the migratory White-crowned Sparrow (Zonotrichia leucophrys gambelii)

Figure 2

Time course of each vigilance state, wake (red), sleep (purple) and drowsiness (purple), in each of the four seasons. Values plotted as mean number of minutes (± SEM,) of each state in 1-hour intervals. Time 0 represents lights on. Note that the fall birds were not scored on the same day and so each bar indicates the dark period for one of the three birds.

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