Humans are normally diurnal, but we are not as immutable as plants or other animals.
The tigers in the park have become diurnal, making it one of the best places to see tigers in India.
Ragweed follows a steady diurnal cycle, releasing pollen at dawn and achieving peak airborne concentrations near noon.
These mountains have a prolonged period of diurnal freeze-thaw that shatters the rock and loosens the fragments.
Of the former they have no measure but the visible diurnal motion of the sun or the monthly revolution of the moon.
The diurnal revolution of the earth brings the joyful sunrise and the pathetic sunset.
