📸 PhotoPhoto: Kim, Hyun-tae · CC BY 4.0 · Wikimedia Commons Source
Huanren Frog
Rana huanrensis (Huanren Frog · Huanren Frog)
💡 Everyday Comparisons for Size, Mass & Speed
- 💡 Unlike other brown frogs, it attaches its eggs to rocks in flowing mountain valley water rather than laying them in rice paddies or still pools (National List of Species of Korea).
- 💡 Widely living in inland mountain valleys across Korea, its egg masses can be seen along the edges of submerged stream rocks in early spring (National List of Species of Korea).
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 Huanren Frog is a brown frog living in inland mountain valleys of Korea and in China, and is a representative frog that lays its eggs in flowing water.
🦴 2. Anatomy & Morphology
It has a distinct black mark behind the eye but none in front of the eye. Its belly and throat have small black spots scattered on a cream-colored background, and during the breeding season both sexes develop green markings on the throat and belly while males lack vocal sacs.
🔍 3. Ecology & Behavior
Around March it attaches egg masses to submerged rocks or edges in flowing valley streams, coming down from the mountains only during the spawning and overwintering seasons. It overwinters under stones on the valley streambed and calls in broken notes, 'kkuuk—kkuuk—ku—ku—kuk.'
🇰🇷 4. Connection to Korea
It is widely distributed in inland mountain valleys across Korea (National List of Species of Korea domestic distribution).
📚 Sources & References
- • IUCN Red List LC (2019) — https://www.iucnredlist.org/species/58619/63855773
- • IUCN Red List category LC — latest assessment at iucnredlist.org
- • catalogueoflife.org — 4RDSM
- • iucnredlist.org — 63855773
- • 국가생물종목록(국립생물자원관) ktsn 120000077148 — https://species.nibr.go.kr/home/mainHome.do?cont_link=009&subMenu=009002&contCd=009002&ktsn=120000077148
- • wikidata.org — Q3418728
- • commons.wikimedia.org — File:Rana huanrensis Kim Hyuntae 2471106.jpg
- • species.nibr.go.kr — mainHome.do
- • Silhouette: PhyloPic — Luca Leicht · CC BY 4.0 (Congeneric silhouette — Pelophylax esculentus)
Recorded dimensions are widely cited representative estimates from public literature and may vary by study or specimen.