
Ithomia iphianassa feeding, La Isla Escondida, Colombia
Relatively large clearwing butterfly. ID based on photo 2582 of this excellent reference guide:
http://www.neotropicalbutterflies.com/colombiapdf/PDFs/PDF13 Montezuma_Mar03_2016.pdf
This is likely the alienassa sub species. I'm not sure what it is feeding on, some decomposing insect?

''Ithomia iphianassa'' is a species of butterfly of the family Nymphalidae. It is found in Central and northern South America.
The larvae feed on ''Cuatresia riparia'', ''Cuatresia morii'', and ''Acnistus arborescens''.
They are a beautiful specie of butterfly.
Similar species: Moths And Butterflies
By Ferdy Christant
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Uploaded Nov 25, 2018. Captured Oct 17, 2018 10:38.