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Author Topic: Is there an adjective for animals that are active during the day?  (Read 7396 times)

Offline DoctorBeaver

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Right, we have nocturnal & crepuscular for animals that are active at night and dawn/dusk respectively. But what about animals that are active during the day? Or at any time? Is there a word?


 

Offline John Chapman

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Yes. Isn't that what diurnal means?
 

Offline John Chapman

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Crepuscular. That's an interesting word that I've not come across before. Do you want some ointment on that?
 

Offline LeeE

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Yup, diurnal is the word.
 

Offline neilep

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Sheesh !..even I knew that ! ::)
 

Offline DoctorBeaver

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Ah yes, diurnal for active anytime. But what about those that are only active during the day?
 

Offline LeeE

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Where did you get a definition that said active anytime?  All the primary definitions for it that I found say activity during daylight.

Diurnal can also refer to daily cycles, and so cover 24 hours, but being a cycle implies change during the period of the cycle (otherwise it's not cyclic but constant).  Diurnal, in this sense, could therefore be applied to nocturnal and crepuscular types as well, as they too are daily cycles; it's just that their high-points do not occur during daylight.
 

Offline DoctorBeaver

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LeeE - so how does that differentiate between those species active during daylight and those active all the time?

(I got the definition from an aninmal site)
 

Offline LeeE

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Umm... I would say that those animals active all the time have no cycle, as there is no periodic variation in their activity.
 

Offline DoctorBeaver

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Non-cyclic diurnalism is a bit of a mouthful but does sound very scientific :D
 

Offline LeeE

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Should it be 'non-cyclic' or 'non-cyclical?

I'm honestly not sure, but if we're going to do it, we should do it right ;D
 

Offline DoctorBeaver

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Non-cyclical sounds more scientific.
 

Offline Karen W.

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http://wiki.answers.com/Q/Whats_the_opposite_term_of_nocturnal

 Diurnal

The opposite is of Nocturnal is (Diurnal) ` meaning happening by day, coming out during the day, occurring every day'. Also animals which come out at twilight are called (Crepuscular).
 

lyner

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le crépuscule:
French word for dusk.
 

Offline Karen W.

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That's so lovely sounding! Don't ya think...?
 

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