cavernous crystalwort vs Polar bear

Riccia cavernosa compared with Ursus maritimus

Key Differences

cavernous crystalwort is Endangered while Polar bear is Vulnerable.

Taxonomic Classification

Rank	cavernous crystalwort	Polar bear
Kingdom	Plantae (plantas)	Animalia (Animals)
Phylum	Marchantiophyta (hepáticas)	Chordata (cordados)
Class	Marchantiopsida (Marchantiopsida)	Mammalia (mamíferos)
Order	Marchantiales (Marchantiales)	Carnivora (carnívoros)
Family	Ricciaceae	Ursidae (Bears)
Genus	Riccia	Ursus (Bears)
Species	Riccia cavernosa	Ursus maritimus

Conservation Status

cavernous crystalwort

EN — Endangered

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	cavernous crystalwort	Polar bear
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

cavernous crystalwort

Habitat

Native to Europe and North America and South America, inhabiting ecosystems characteristic of the region.

Range

Widely distributed across Europe (6 countries), North America (United States), and South America (Brazil). Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Polar bear

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.

cavernous crystalwort

The Cavernous crystalwort (Riccia cavernosa) is a species in the genus Riccia. It is currently classified as Endangered on the IUCN Red List. Native to Europe and North America and South America, inhabiting ecosystems characteristic of the region.

Polar bear

O maior carnivoro terrestre da Terra, o urso-polar pode ultrapassar 700 kg e e encontrado pelo gelo marinho artico, do Canada ate a Russia. Mamiferos marinhos altamente especializados que dependem do gelo marinho para cacas de focas e focas-barbadas. Excelentes nadadores capazes de percorrer grandes distancias em aguas abertas. Classificado como Vulneravel, com populacoes sob severa pressao devido a rapida perda de gelo marinho artico causada pelas mudancas climaticas.