nocturnal(primarily active during the night) adjective [UK: nɒk.ˈtɜːn.l̩] [US: nakˈtɝː.nl̩]Most geckos are nocturnal. = La mayoría de las salamanquesas son noctámbulas.
noctámbulonoun {m}
night owl [night owls](one who is awake at night) noun [UK: naɪt aʊl] [US: ˈnaɪt ˈaʊl]