Animals like rabbits, house cats and deer are neither nocturnal nor diurnal. Instead, they're crepuscular. Jaymi Heimbuch is a writer and photographer specializing in wildlife conservation ...

So, are deer nocturnal or diurnal, or do they exhibit other unusual sleeping patterns of which we are unaware? There are ...

Nocturnal species and Diurnal species -- The reef becomes a very different place at night because all kinds of animals come out when the sun goes down. There is a whole different undersea world ...

For example, diurnal animals are busy in daylight, while nocturnal animals are active at night. Crepuscular creatures use the transitional light of sunrise and sunset.

They tend to sleep at night and lay low during midday. This differs from animals that are nocturnal or diurnal. Read on to learn why this is an efficient way for them to live and what local ...

Unlike euchromatin, the gene activation of heterochromatin is low. Between nocturnal and diurnal animals, though, the differences in nuclear architecture get bigger -- especially around the retina.

Zee tells Splash, Bubbles, Dunk & Ripple that she is nocturnal, which means she stays awake all night and sleeps during the day. Splash and friends are diurnal, which means they sleep all night ...

Light-sensitive cells in the retina come in two main types: rods and cones. Rods are used for vision at low light and cones for color and bright light. A study in the September issue of the ...

Multiple studies from around the globe have now shown that, as climate change makes daytime temperatures rise, animals tend toward nocturnal ... strategy adopted by diurnal endotherms in response ...

Because of rods' and cones' different functions, nocturnal animals (such as lab mice) tend to have retinas rich in rods. On the other hand, diurnal animals like the tree squirrel and tree shrew ...