Crepusculous

• (a.) Flying in the twilight or evening, or before sunrise; -- said certain birds and insects. • (a.) Pertaining to twilight; glimmering; hence, imperfectly clear or luminous.
Found on http://thinkexist.com/dictionary/meaning/crepusculous/

crepusculous

crepusculous 1. Flying in the twilight or evening, or before sunrise; referring to certain birds and insects. 2. Pertaining to twilight; glimmering; hence, imperfectly clear or luminous. Creatures that feed only in the twilight; such as, bats and owls, are called crepuscular.
Found on http://www.wordinfo.info/words/index/info/view_unit/2217/
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