Spicauda tanna, the Tanna longtail, is a species of butterfly in the family Hesperiidae. It is found from Ecuador and French Guiana, north through Central America to Mexico. Rare strays can be found up to the lower Rio Grande Valley in Texas.

Tanna longtail
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Lepidoptera
Family: Hesperiidae
Genus: Spicauda
Species:
S. tanna
Binomial name
Spicauda tanna
(Evans, 1952)
Synonyms
  • Teleus tanna (Evans, 1952)
  • Urbanus tanna Evans, 1952

The wingspan is 33–38 mm. Adults are on wing from June to December in Mexico and in June in southern Texas.

The larval host is unknown. Adults probably feed on flower nectar.

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