Zebra's are more active in daylight, spending nights preferably
on short pasture relatively safe from ambush. Zebras graze
individually an hour or so at a time at night but move about
very little. Resting zebras often steep soundly, but at
least one herd member remains standing and alert. At daybreak
in warm weather, herds begin filing to pastures of longer
grass and may cover over 10 mi (17 km) before settling for
another night. Mass movements between pastures and sleeping
grounds, and to water at midday, are also peaks of social
activity; stallions in bachelor herds are especially active
and entertaining to watch.
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