Fluminense swallowtail
Parides ascanius
- Vulnerable
- Card rarity: Rare
- Insects

Parides ascanius, the Fluminense swallowtail, is a species of butterfly in the family Papilionidae. It is endemic to Brazil where it is confined to the municipalities of Atafona and Itaguaí.It is found in subcoastal swamps and thickets ('restinga'). It is a said to be a primitive species, lacking vigour and facing competition from the sympatric Parides zacynthus and Parides anchises nephalion, the two most advanced members of the genus, both strong and aggressive species.
Classification
- Class
- Insecta
- Order
- Lepidoptera
- Family
- Papilionidae
- Genus
- Parides