Take-off Flight of the Butterfly Colias erate Esper

Abstract

This paper describes the details of the movement of wings and body in take-off flight of a butterfly Colias erate Esper. The mechanism of lift generation in take-off flight of the butterfly is considered from the experimental view point. The butterfly generates a rising force even in the upstroke of wing flapping. The butterfly generates not only the vortex-wing interaction but also the lift force based on the usual blade-element theory.