Noun night raven has 2 senses
  1. night heron, night raven - nocturnal or crepuscular herons
    --1 is a kind of heron
    --1 has particulars:
     black-crowned night heron, Nycticorax nycticorax; yellow-crowned night heron, Nyctanassa violacea
  2. night raven - any bird that cries at night
    --2 is a kind of
    night bird
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