- This article is about a type of insect. You may be looking for STO - The Iconian War mission: "Butterfly".
A butterfly is a class of insect that are known for their bright-colored wings. Several varieties of butterfly have been seen throughout the galaxy, including Earth, Rigel X, Ba'ku, and Risa. (TOS - The Janus Gate novel: Present Tense; ENT episode: "Broken Bow"; TNG movie: Star Trek: Insurrection; and ST video game: Star Trek Online)
Additionally, the idiom "butterflies in the stomach" is often used to refer to a sense of nervousness; Captain Jean-Luc Picard noted the feeling when he was about to evade the Borg in order to return James T. Kirk to the Nexus in an alternate timeline. (Star Trek novel: Engines of Destiny)