E. formosa may refer to:
Eilema formosa, a Malagasy moth Elachura formosa, a passerine bird Encarsia formosa, a parasitic wasp Enchelynassa formosa, a saltwater eel Euchromia formosa, an African moth Eudonia formosa, a moth endemic to Hawaii Eudromia formosa, a South American tinamou Eufriesea formosa, a euglossine bee Eulepidotis formosa, a neotropical moth Eupithecia formosa, a Chinese moth