Green Sea Turtle vs Madeira Shield-Fern

Chelonia mydas compared with Polystichum drepanum

Key Differences

• Green Sea Turtle is Endangered while Madeira Shield-Fern is Critically Endangered.

Taxonomic Classification

Rank	Green Sea Turtle	Madeira Shield-Fern
Kingdom	Animalia (動物)	Plantae (植物)
Phylum	Chordata (脊索動物)	Tracheophyta
Class	Reptilia (爬虫類)	Polypodiopsida (ウラボシ綱)
Order	Testudines (カメ)	Polypodiales (ウラボシ目)
Family	Cheloniidae (Sea Turtles)	Dryopteridaceae
Genus	Chelonia (Green Sea Turtles)	Polystichum
Species	Chelonia mydas	Polystichum drepanum

Conservation Status

Green Sea Turtle

EN — Endangered

Population: ~85.0K

Trend: Decreasing ↓

Madeira Shield-Fern

CR — Critically Endangered

Physical Characteristics

Attribute	Green Sea Turtle	Madeira Shield-Fern
Diet	Herbivore	—
Average Lifespan	80 years	—
Average Length	1.2 m	—
Average Weight	200.0 kg	—

Habitat & Geographic Range

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.

Madeira Shield-Fern

Habitat

Typically found in moist, shaded forest floors and tropical canopies.

Range

Found in Portugal. Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Green Sea Turtle

アオウミガメは最も大きなウミガメの一つです。甲羅ではなく軟骨と脂肪の緑色に由来して名付けられました。