dolphins are day animals .at night they sleep with one eye open to watch for prey and predators.
Monkeys usually sleep upside down on a branch or can find a shelter somewere !
House cats sleep both day and night.
Diurnal animals are active during the day and sleep at night.
They sleep during the day and hunt at Night.
How to Survive Puppy's First Night
How Daylight Benefits the Entire Office
How to Stop a Dog from Howling in the Night
How to Use Night Lights in a Reef Aquarium