Delta maidenhair fern vs ours blanc

Adiantum raddianum compared with Ursus maritimus

Key Differences

• Delta maidenhair fern is Not Evaluated while ours blanc is Vulnerable.

Taxonomic Classification

Rank	Delta maidenhair fern	ours blanc
Kingdom	Plantae (plante)	Animalia (animal)
Phylum	Tracheophyta	Chordata (Chordates)
Class	Polypodiopsida (Filicopsida)	Mammalia (mammifères)
Order	Polypodiales (Polypodiales)	Carnivora (carnivores)
Family	Pteridaceae	Ursidae (Bears)
Genus	Adiantum	Ursus (Bears)
Species	Adiantum raddianum	Ursus maritimus

Conservation Status

Delta maidenhair fern

NE — Not Evaluated

ours blanc

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Delta maidenhair fern	ours blanc
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

Delta maidenhair fern

Habitat

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

Range

Widely distributed across Africa (5 countries), Asia (Nepal, Sri Lanka, Taiwan), Europe (6 countries), North America (Trinidad and Tobago, United States), Oceania and the Pacific (Kiribati, Papua New Guinea), and South America (Brazil, Colombia).

ours blanc

Habitat

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

Range

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

ours blanc

The largest land carnivore on Earth, polar bears can exceed 700 kg and are found across Arctic sea ice from Canada to Russia. Highly specialized marine mammals that rely on sea ice to hunt ringed and bearded seals. Excellent swimmers capable of covering vast distances in open water. Listed as Vulnerable, with populations under severe pressure from rapid Arctic sea ice loss due to climate change.