| 1. | Diurnal variation is approximately, falling to the low by night.
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| 2. | Ostriches are diurnal, but may be active on moonlit nights.
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| 3. | In cases such as the zebra mussel, diurnal mongoose ).
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| 4. | In Jupiter, the god of diurnal ( daylight ) thunder.
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| 5. | The Santa Cruz Mountains are subject to sharp diurnal temperature fluctuations.
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| 6. | The nilgai is diurnal ( active mainly during the day ).
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| 7. | Like most New World monkeys, they are diurnal and arboreal.
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| 8. | Natal dens are usually larger and more complex than diurnal dens.
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| 9. | It is diurnal and rests for up to half the day.
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| 10. | They are diurnal animals, and navigate in very small herds.
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