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線紋蜻蜓冬天擬態又取暖~世界生態奇觀
搜主題

  • 英文名:Line Forest-Skimmer’s Wintertime Mimicry – Ecological Wonder
  • 作者:鄭焜龍
第6屆科學攝影展 - 佳作獎
科學圖說

線紋蜻蜓據瞭解分布在臺南以南的山區,冬天很少活動。本作品拍攝於臺南的崁頭山步道。有趣的是,發現線紋蜻蜓在溫度低於16度時,牠的尾巴會往背部彎曲,7度時甚至呈半圓形,若溫度持續低溫,可發現牠們兩三天都保持在枯藤上,待太陽出來,回溫至18度以上後,尾巴就會伸直,接著振翅飛離覓食。樹枝有很多條,但觀察到牠們都聚集在這一條,周遭有很多鳥類,牠們卻平安無事,真是生態奇觀!

Introduction

The distribution of the line forest-skimmer (Cratilla lineata) is in mountainous areas of Tainan and southward. They are rarely seen in winter. This set of images is from the Kantou Mountain Trail in Tainan. When the temperature falls below 16℃, the tail of this dragonfly bends towards its back. At 7℃, it forms a semicircle. Under cold conditions, it can stay on a branch for two or three days. When the sun comes out and the temperature returns to above 18℃, the tail straightens and it flies away to seek food. There are many branches but these dragonflies gather on just one. With many birds nearby they stay safe this way. This is quite an ecological wonder.

鄭焜龍-線紋蜻蜓冬天擬態又取暖~世界生態奇觀1
鄭焜龍-線紋蜻蜓冬天擬態又取暖~世界生態奇觀1
鄭焜龍-線紋蜻蜓冬天擬態又取暖~世界生態奇觀2
鄭焜龍-線紋蜻蜓冬天擬態又取暖~世界生態奇觀2
鄭焜龍-線紋蜻蜓冬天擬態又取暖~世界生態奇觀3
鄭焜龍-線紋蜻蜓冬天擬態又取暖~世界生態奇觀3
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2023/07/22 更新