crepuscular


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crepuscular

(of certain insects, birds, and other animals) active at twilight or just before dawn

crepuscular

[krə′pəs·kyə·lər]
(zoology)
Active during the hours of twilight or preceding dawn.
References in periodicals archive ?
Where [L.sub.diurnal] is the diurnal index, [I.sub.crepuscular] is the crepuscular index, [ACT.sub.day] is the mean activity in the daytime, [ACT.sub.night] is the mean activity in the nighttime, [ACT.sub.twilight] is the mean activity during twilight, and [ACT.sub.non-twilight] is the mean activity during the remainder of the day.
Activity patterns: Activity patterns were established as: nocturnal, from 20:00 to 06:00; crepuscular, from 06:00 to 08:00, and 18:00 to 20:00, and diurnal, from 08:00 to 18:00 (Monroy-Vilchis et al., 2011).
The strongest signal was observed during crepuscular hours, especially at dawn, when sharks swam at considerably shallower depths (Fig.
nasua) presento 83% de sus registros concentrados en horas de plena luz del dia, pero tambien mostro algo de actividad crepuscular (11.3% de registros).
Unique observations were grouped into 2-wk periods to facilitate the calculation of indices for nocturnal, diurnal, and crepuscular activity.
Her brooding thoughts are a snug fit for the foggy, crepuscular R and B sound championed by the seminal tunes of The Weeknd.
Scent was collected from inflorescences using dynamic headspace methods (Raguso and Pellmyr, 1998) during five different time periods: three samples during the crepuscular morning period (approximately 0700-0900 CDT), five during mid to late morning (~1000-1200), seven during early to mid-afternoon (~1400-1600), six during the crepuscular evening period (~1930-2130), and five samples during a nocturnal evening period (~2200-2400).
Lions are primarily nocturnal, and very active in the evening and pre-dawn, being also crepuscular in nature.