John James Audubon

The varying modes of flight exhibited by our diurnal birds of prey have always been to me a subject of great interest, especially as by means of them I have found myself enabled to distinguish one species from another, to the farthest extent of my power of vision.

American Scientist

Siri Hustvedt

Nobody knows what either sleep or waking consciousness is, even though these two have long been seen as the two sides of being: part of life's unvarying diurnal rhythm.

American Novelist

Diurnal often describes an organism's active hours, opposite of nocturnal.

Activity Pattern

Don't confuse diurnal with nocturnal, which means active at night.

Common Confusion

Diurnal can describe processes that occur during daylight, like photosynthesis.

Environmental Context

Diurnal implies an event completes in the daytime within a single day.

Short Duration

Highlighting the brief nature of something, often contrasted with permanent.

Ephemeral Nature

In astronomy, diurnal refers to cycles lasting about 24 hours.

Astronomy Specific

Used in a technical context, it may confuse casual conversation.

Technical Jargon

Use it for precision in scientific or detailed discussions on daily cycles.

Precise Terminology

 We did this in both diurnal and nocturnal surveys. We wanted to understand the ways in which hunting, and I was very unidirectionally focused, looking at how hunting impacted these wildlife population dynamics, and not just lemurs but the tenrecs. These are like little hedgehogs. We set up a mark and capture project

Christopher Golden: Bush...

 helps they're certainly becoming more active during the day so they've always been diurnal they're not naturally nocturnal because the awareness has been raised about otters people are more prone to see them if that makes sense so it's all about getting the education out raising the awareness about the species

Reintroducing The...

 so there it's like a little cocoon of saliva which doesn't sound great and it completely protects them from odours being released so the Predators cannot actually smell the parrotfish so it's the same in the coral reefs as it is on one the diurnal animals will begin to

Safari Live - Day 356 PIPE...

 danger isn't really from the Lions you can't see during the day Lions have a very healthy respect for human beings human beings being the dominant diurnal predator and they'll actually try to avoid or run away from human beings mostly and the brushroll cars were safe

Safari Live - Day 134 PIPE...

 day now where we kind of all the daylight's animals are starting to stop and it's about to come they're kind of peaceful time where it's just in between the nocturnal and the diurnal sort of sounds and Bush goes very very very stories at this time that you want to

Safari Live - Day 329 PIPE...

 night and you don't want to you don't want to affect the hunt so that would be very difficult and less that's a diurnal animal often cheetah well cheetah will normally always hunt in daylight hours or all full moon they've been known to hunt in full moon

Safari Live - Day 333 PIPE...

 disappeared means that we are switching to infrared I'm going to be switching to infrared and of course for the duration of the drive we will be in infrared hours a diurnal fall from what we've seen not so much but as an essentially

Safari Live - Day 42 PIPE...

 yes you do a good boy you're a good boy well done thank you in those gorgeous brown eyes deep deep deep in color not the light-colored eyes of a lipid or lion that of course a indicative of a diurnal hunter Amy says that he would

Safari Live - Day 304 PIPE...

 cheetah are generally diurnal hunters they hunt during the day and especially in the harsh light of the day those black markings help reflect light away from the eyes so now able to see a lot better when they're are chasing down

Safari Live - Day 178 PIPE...

 chance to see the slender because they're just so quick and they're quite shy as well so they tend to stick to the undergrowth but they are a mongoose that are diurnal they they're active during