Nessaea hewitsonii, the Hewitson's olivewing, is a species of butterfly of the family Nymphalidae. It is common in a broad range of the Amazon basin including the eastern slopes of the Andes mountain range. It is found in high evergreen tropical forest, semi-deciduous tropical forest, and riverine forest.Neotropical Nymphalidae VII. Revision of Nessaea
The length of the wings is 33–40 mm for males and 36–41 mm for females.
Subspecies Nessaea hewitsonii hewitsonii (from Colombia, Ecuador and Peru eastward into the Amazon valley, and south to Rondonia, Brazil) Nessaea hewitsonii boliviensis Jenkins, 1989 (Bolivia and southern Peru)
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