📸 PhotoPhoto: Charles J. Sharp · CC BY-SA 4.0 · Wikimedia Commons Source
Hoatzin
Opisthocomus hoazin (Hoatzin · ツメバケイ)
💡 Everyday Comparisons for Size, Mass & Speed
- 💡 It is hunted as game in various parts of South America (ADW).
- 💡 Its body length of about 66 cm is about 2/3 of a 1 m ruler (Comparison).
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 Hoatzin is a bird living in the swamps and riverside forests of South America that feeds mainly on leaves and has a digestive system unique among birds. Newly hatched chicks have claws on their wingtips.
🦴 2. Anatomy & Morphology
It has bare blue facial skin, red eyes, and a reddish-brown crest on the head; the outer body plumage is chestnut, and the long tail is bronze-green with a white tip. Chicks have a pair of functional claws on the first and second digits of the wingtips, which are lost as they grow.
🔍 3. Ecology & Behavior
It feeds mainly on the leaves of around twelve plant species and occasionally eats flowers and fruits. It is the only bird that performs 'foregut fermentation,' in which bacteria in an enlarged crop break down leaf cell walls.
🇰🇷 4. Connection to Korea
No direct record connecting this species to Korea has been found.
📚 Sources & References
- • IUCN Red List LC (2024) — https://www.iucnredlist.org/species/22684428/264086808
- • IUCN Red List category LC — latest assessment at iucnredlist.org
- • doi.org — avilist.v2026
- • iucnredlist.org — 264086808
- • wikidata.org — Q188660
- • commons.wikimedia.org — File:Hoatzin (Opisthocomus hoazin) Rio Napo.jpg
- • animaldiversity.org — Opisthocomus hoazin
- • Silhouette: PhyloPic — Warren H (photography), T. Michael Keesey (vectorization) · CC BY 3.0
Recorded dimensions are widely cited representative estimates from public literature and may vary by study or specimen.