
thumb|right|Owl|Owls are well known for being nocturnal, but some owls are active during the day.
thumb|right|Owl|Owls are well known for being nocturnal, but some owls are active during the day.
Nocturnality is a behavior in some non-human animals characterized by being active during the night and sleeping during the day. The common adjective is nocturnal, with diurnal meaning the opposite.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).