Cloudless Sulphur (Phoebis sennae)

OTHER NAMES: N/A
Latin Etymology: Phoebis (bright/pure) sennae (from Senna - a major host plant genus)

Adult Cloudless Sulphur (Phoebis sennae) at Tarcoles, Costa Rica - November 2025

Featured Subspecies: Phoebis sennae sennae
Length: 5.5-7cm  /  Wingspan: 4.8-6.5cm
NO UK STATUS / IUCN Red List: Not Yet Evaluated 

A widely distributed species of butterfly found from Canada to Argentina, where it has a wide variety of habitats and food plants. It favours open and semi open areas, while its foodplants include corda, bougainvillea, cardinal flower, hibiscus, morning glory and sennas. It was formerly credited with having a third subspecies - Phoebis marcellina, but this has now been elavated to full species status as the Marcellina Sulphur.
 
Related Species: 
Order: Lepidoptera
Family: Pieridae
Genus: Phoebis
SUBSPECIES: P. s. amphitrite, P. s. sennae
 

- Sighting Locations -
COSTA RICA 
A widespread, common resident
- COSTA RICA 2025 TRIP: Seen at Tarcoles 

Further Notes: BirdForum Opus, IUCN Red List, RSPB, Wikipedia, Xeno-canto