Common Ostrich vs Green Sea Turtle

Struthio camelus compared with Chelonia mydas

Key Differences

• Common Ostrich is Least Concern while Green Sea Turtle is Endangered.
• Common Ostrich is omnivore while Green Sea Turtle is herbivore.
• Green Sea Turtle is 2.0x heavier than Common Ostrich.
• Green Sea Turtle lives longer (80 years vs 45 years).

Taxonomic Classification

Rank	Common Ostrich	Green Sea Turtle
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Aves (Birds)	Reptilia (Reptiles)
Order	Struthioniformes (Struthioniformes)	Testudines (Turtles & Tortoises)
Family	Struthionidae	Cheloniidae (Sea Turtles)
Genus	Struthio	Chelonia (Green Sea Turtles)
Species	Struthio camelus	Chelonia mydas

Evolutionary Relationship

Common Ostrich and Green Sea Turtle share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Common Ostrich

LC — Least Concern

Trend: Stable →

Green Sea Turtle

EN — Endangered

Population: ~85.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Common Ostrich	Green Sea Turtle
Diet	Omnivore	Herbivore
Average Lifespan	45 years	80 years
Average Length	2.1 m	1.2 m
Average Weight	100.0 kg	200.0 kg

Habitat & Geographic Range

Common Ostrich

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, temperate broadleaf and mixed forests, and temperate coniferous forests, among 4 distinct biome types within the Indomalayan biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Asia (4 countries), Europe (5 countries), and South America (Colombia, Ecuador, Peru).

Green Sea Turtle

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical grasslands and savannas, among 8 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Distributed across Australia, Brazil, Costa Rica, Indonesia, and Mexico. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Common Ostrich

The world's largest and heaviest living bird, common ostriches stand up to 2.8 meters tall and weigh 156 kg, inhabiting savannas and semi-arid plains of Africa. Flightless, they compensate with powerful long legs capable of delivering lethal kicks and sustaining running speeds of 70 km/h — the fastest of any bird. Their large eyes are the biggest of any land vertebrate. Ostriches lay the largest eggs of any living bird.

Green Sea Turtle

The green sea turtle is one of the largest sea turtles. They are named for the green color of their cartilage and fat, not their shells.