nocturnal

nocturnal, circadian, photoperiodic, crepuscular, diurnal variation, oscillatory, anting, circadian rhythm, pineal, endothermic, nrem sleep, irruptive, pine siskin, superior colliculus, temporal, contractile, rostral, diffusive, phylogenetic, estrous, punctate, estrous cycle, saccadic, vernal, wavelike, passerine, geomagnetic, electroencephalographic, antennal, metazoan, dimorphic, morphological, oestrus, stomatal, pineal gland, caudal, astrocytic, cenozoic, intransitive, sine curve, neuroanatomical, anterograde, cyclic, vesper sparrow, postprandial, altitudinal, hippocampal, cyanobacterial, postsynaptic, cortical, motile, alanine, hypothalamic, insectivorous, dipolar, morphogen, swamp sparrow, homeostatic, adrenocortical, organismal, glomerular, hawkmoth, montane, heterochromatic, photosynthetic, neotropical, hydrologic cycle, catecholamine, psychophysical, physiologic, meadow vole, startle reflex, pileated, conformational, inspiratory, convective, gonadal, entrained, teleost fish, sinusoidal, photic, intraspecific, ventral, faunal, tympanic, ingestive, metabolic, lateral ventricle, synaptic, arboreal, ectothermic, tufted puffin, planktonic, synoptic, mammalian, hypopnea, earthshine, somatosensory, oxidative phosphorylation, apical, drosophila melanogaster, migrational, fluctuation, fluctuations, periodicities, spectral, variation, deviation, deviations, dif, downstream, maxima, pre, rainfalls, variations, fio, curvatures, dip, intra, non, radial, ranges, diel, semidiurnal, seasonal, decadal, latitudinal, amplitude, cyclical, observed, tidal, precessional, undesired, erratic, eustatic, pendular, predictable

adapid, adapid group, bird of jove, butterfly, eagle, falcon, falconiformes, hawk, hawk owl, night, order falconiformes, sidereal time, suricata tetradactyla, suricate, surnia ulula, vulture

cyclic, cyclical