noc·tur·nal / knock.ter.nal
adjective – in animals: being mostly active at nighttime; in flowering plants: blooming at night
related forms of nocturnal: nocturnally (adverb)
nocturnal in a sentence: Most owls are nocturnal, doing the bulk of their hunting at night
examples of nocturnal in nature: emerald tree boas, most pangolins, tawny frogmouths, moray eels, quokkas, kakapos, Honduran white bats, axolotls,
see also: diurnal, crepuscular