旧北区のチョウ，ベニシジミが屋久島まで南下した

抄録

In recent years in Japan, not a few southern butterflies have expanded their ranges northward. Around 2006, however, the palaearctic Lycaena phlaeas chinensis (C. Felder, 1862) moved southward to Yakushima, and the species seems to have become an established resident there. The present paper reports its expansion processes, and discusses the cause of this southward expansion.