🪐 View in 3D Galaxy 📏 View on 3D Scale Stage

🧬 Biological Classification (Kingdom to Species)Podocnemis expansa

Kingdom

Animalia

Phylum

Chordata

Class

Reptilia

Order

Testudines

Family

Podocnemididae

Genus

Podocnemis

Species

Podocnemis expansa

Reptilia🌿 Herbivore

Arrau River Turtle

Podocnemis expansa (Arrau River Turtle · オオヨコクビガメ)

🛡️ Conservation Status (IUCN Red List)NT (Near Threatened)

IUCN 의 옛 등급 «LR/cd(보전 의존)»으로 평가된 종입니다. 지금 기준으로는 준위협에 가깝습니다.

Geological Era

Extant

Diet

Herbivore

Length · Height

80cm · No data

Mass · Top Speed

65kg · No data

Habitat & Fossil Locality

Major rivers of the Amazon and Orinoco basins (including nesting sandbars)

💡 Everyday Comparisons for Size, Mass & Speed

💡 A carapace length of over 80 cm is close to the length of a long umbrella (about 90 cm), and a maximum weight of 65 kg is just over three 20 kg bags of rice (Comparison).
💡 Overharvesting for its eggs, meat, and oil caused severe declines, and after the Brazilian government and others released thousands of hatchlings from protected nests, some populations stabilized (IUCN).

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.

📊 Mass & Speed Index (0–100)

⚖️ Mass Index (Blue Whale ~190 t = 100, log scale)58

Site-computed relative index from recorded values; not a formal scientific metric.

#아라우거북#Podocnemis expansa

📖 1. Overview

The Arrau River Turtle is a large freshwater turtle living in major rivers of the Amazon and Orinoco basins. In the past, thousands of individuals swam upstream and gathered on high sandbars to lay eggs.

🦴 2. Anatomy & Morphology

Its hard, large carapace is dark gray to brown or olive, and males and females differ in size. Females and hatchlings make sounds underwater to communicate with each other.

🔍 3. Ecology & Behavior

Juveniles are omnivorous, eating stems, leaves, and invertebrates, whereas adults become herbivorous and disperse seeds. During the dry season when river levels drop, they gather in groups on exposed sandbars to nest, with up to 172 eggs recorded in a single clutch.