nocturnally


noc·tur·nal

N0125700 (nŏk-tûr′nəl)adj.1. Of, relating to, or occurring in the night: nocturnal stillness.2. Botany Opening at night. Used of flowers.3. Zoology Most active at night: nocturnal lizards.
[Middle English, from Old French, from Late Latin nocturnālis, from Latin nocturnus, from nox, noct-, night; see nekw-t- in Indo-European roots.]
noc·tur′nal·ly adv.
Thesaurus
Adv.1.nocturnally - at night; "nocturnally active bird"