Vespertine is a term used in the
life sciences to indicate something of, relating to, or occurring in the evening. In
botany, a vespertine
flower is one which opens or blooms in the evening, while in
zoology, it describes a creature that becomes active in the evening, as bats and owls. Vespertine animals are frequently described as "nocturnal", although this usage is not strictly correct. (See also
crepuscular.) Etymologically it is related to
Vespers, which is a term in astronomy that refers to Venus in the night sky. A synonym for vespertine both in botany and zoology is "crepuscular", although strictly speaking "crepuscular" refers to both early morning and early evening.
See more at Wikipedia.org...