Wordnet polsko-angielski 
                         (a person who likes to be active late at night) 
night owl, nighthawk, nightbird 
Nowoczesny słownik polsko-angielski 
                        night owl
nightbird
nighthawk
 (a person who likes to be active late at night) 
night owl, nighthawk, nightbird 
night owl
nightbird
nighthawk