Cydno Longwing butterfly

Dorsal view of a Heliconius cydno specimen, otherwise known as Cydno Longwing. It is found in North, Central and South America from Mexico to Colombia and Ecuador.

Part of the collection donated to the Smithsonian Institution National Museum of Natural History by retired U.S. Marine Colonel Stanley S. Nicolay, who was known for his field research on the butterflies of Panama and Ecuador and for his taxonomic papers on Neotropical Lycaenidae and Hesperiidae. Nicolay, who was a longtime collaborator with Smithsonian engomologists, donated his collection of 42,000 specimens to the Museum.