📸 PhotoPhoto: Alpsdake · CC BY-SA 4.0 · Wikimedia Commons Source
Golden-ringed dragonfly
Anotogaster sieboldii (Golden-ringed dragonfly · オニヤンマ)
💡 Everyday Comparisons for Size, Mass & Speed
- 💡 A female's maximum abdomen length of 8.5 cm is almost the same as the long side of a credit card (8.56 cm) (Comparison).
- 💡 It has a habit of patrolling around specific waterside spots, and water pollution is reported to reduce its numbers (Taiwan Council of Agriculture).
Reference standards: coach bus ~12 m, mid-size car ~4.9 m, compact car ~1 t, basketball hoop 3.05 m, credit card 8.56 cm.
📖 1. Overview
The golden-ringed dragonfly is a large dragonfly widely distributed in the eastern Palearctic from Sakhalin, Japan, and eastern China to Taiwan. The IUCN assessed it as Least Concern (LC) in 2020.
🦴 2. Anatomy & Morphology
It is characterized by large green eyes, yellow stripes on the upper frons and base of the labium, a black thorax with slanted yellow bands, and yellow markings on each abdominal segment. The abdomen length is 6.8–7.5 cm in males and 7.8–8.5 cm in females.
🔍 3. Ecology & Behavior
It is strongly territorial, patrolling back and forth around specific waterside areas. In Taiwan it is still common, though water pollution may have caused sudden local declines.
🇰🇷 4. Connection to Korea
It is listed on the National List of Species of Korea as "Jangsujamjari" (Korean name).
📚 Sources & References
- • IUCN Red List LC (2020) — https://www.iucnredlist.org/species/167214/1174310
- • IUCN Red List category LC — latest assessment at iucnredlist.org
- • catalogueoflife.org — 5V8FD
- • iucnredlist.org — 1174310
- • 국가생물종목록(국립생물자원관) ktsn 120000079698 — https://species.nibr.go.kr/home/mainHome.do?cont_link=009&subMenu=009002&contCd=009002&ktsn=120000079698
- • wikidata.org — Q1303921
- • commons.wikimedia.org — File:Anotogaster sieboldii (male s8).jpg
- • subjectweb.forest.gov.tw — insect 91.htm
- • Silhouette: PhyloPic — Lisa Nicvert · CC0 1.0 (Related taxon silhouette — Cordulegaster boltonii)
Recorded dimensions are widely cited representative estimates from public literature and may vary by study or specimen.