The objective of this study was to report the group mating of Asian Keelback snake, Hebius vibakari, in South Korea. On May 20, 2009, the group mating of H. vibakari was observed in the Maeng-gol do, Jindo-gun, Jeollanam-do, in the rocky area (107 m above sea level) on the ridge of the island. Six female and five male snakes made a form of mating behavior called “mating ball”. Two couples showed “tail-wrestling” which is the copulation behavior in snake species. During the mating, the temperature and humidity were 25.7°C and 59%, respectively. The result of this study was the first case report of the group mating in H. vibakari, a rare reptile.

• 구교성(전남대학교 생태모방연구센터, Research Center of Ecomimetics, Chonnam National University) | Kyo Soung Koo
• 장민호(국립생태원, National Institute of Ecology) | Min-Ho Chang
• 송재영(국립공원연구원, Korea National Park Research Institute) | Jae-Young Song Corresponding author