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Matutinal
Natural world activity in early morning
Birds flying before dawn over the Maasai MaraMatutinal activity occurs in the twilight period from dawn to sunrise
Matutinal, matinal (in entomological writings),[1][2] and matutine are terms used in the life sciences to indicate something of, relating to, or occurring in the early morning. The term may describe the morning activities of crepuscular animals that are significantly active during the predawn or early hours and which may or may not then be active again at dusk, in which case the animal is also said to be vespertinal/vespertine. During the morning twilight period and shortly thereafter, these animals partake in important tasks, such as scanning for mates, mating, and foraging.[3][4][5]
Matutinal behaviour is thought to be adaptive because there may be less competition between species, and sometimes even a higher prevalence of food during these hours.[6] It may also serve as an anti-predator adaptation by allowing animals to sit between the brink of danger that may come with diurnal and nocturnal activity.[4][7]
^Linsley, E. G.; Cazier, M. A. (1970). "Some Competitive Relationships among Matinal and Late Afternoon Foraging Activities of Caupolicanine Bees in Southeastern Arizona (Hymenoptera, Colletidae)". Journal of the Kansas Entomological Society. 43 (3): 251–61. JSTOR25082327.