diurnal, nocturnal (in CC amphib glossary)

[fishkeeper]

diurnal: Active by day

Nocturnal: Active by night. Most caudates are nocturnal.

 

[MRIGUY]

Both term can also be used to describe the timming of a recurring event such as a plant that opent its leaves every morning etc.

 

[Jennewt]

Isn't there also a term for animals that are active at dawn/dusk?

 

[Jan]

Isn't there also a term for animals that are active at dawn/dusk?

That would be crepuscular.

 

[Jan]

The time span during a 24-hour day that animals display their greatest activity can be described by adjectives defining three separate photoperiods:

Diurnal – most active during daylight hours
Nocturnal – most active at night during darkness (most caudates are nocturnal)
Crepuscular – most active during twilight hours at dawn and dusk

The term 'activity' within this context refers to natural or normal functions and may include: movement, feeding, hunting, migration, breeding, nest building, etc.

 

[Kaysie]

Well, I think that just about says it all.

 

[Jan]

Well, I think that just about says it all.

Thanks Kaysie.
I've never seen these defined this way - but I think this is what the terms really mean. Glad you concur.