4I6A2784溪神蜻蜓群聚 Blue Chaser(Potamarcha congener)

北台灣這個冬季發現兩處溪神蜻蜓群聚的族群,為何有此現象仍無確定的解釋.

攝於新店.

This winter at northern Taiwan, two groups of Blue Chasers are noted to be in aggregation. There is no definite explanation about this phenomenon.

Done