Common Water-Parsnip vs Polar bear

Sium suave compared with Ursus maritimus

Key Differences

Common Water-Parsnip is Least Concern while Polar bear is Vulnerable.

Taxonomic Classification

Rank	Common Water-Parsnip	Polar bear
Kingdom	Plantae (植物)	Animalia (动物界)
Phylum	Magnoliophyta (木兰植物门)	Chordata (脊索动物门)
Class	Magnoliopsida (木兰纲)	Mammalia (哺乳動物)
Order	Apiales (伞形目)	Carnivora (食肉目)
Family	Apiaceae	Ursidae (Bears)
Genus	Sium	Ursus (Bears)
Species	Sium suave	Ursus maritimus

Conservation Status

Common Water-Parsnip

LC — Least Concern

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Common Water-Parsnip	Polar bear
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

Common Water-Parsnip

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

Distributed across Canada, Mexico, Norway, Taiwan, and United States.

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.

Common Water-Parsnip

<em>Sium suave</em>, commonly known as the common water parsnip or hemlock water parsnip, is a perennial wetland herb in the family Apiaceae. It is classified as Least Concern by the IUCN and is distributed across a wide geographic range that includes Canada, the United States, Mexico, Norway, and Taiwan, reflecting its adaptability to temperate and subtropical freshwater margins. The species typically grows in marshes, wet meadows, stream banks, and shallow water, rooting in saturated soils with stems partially submerged. It produces pinnately compound leaves with serrated leaflets and bears flat-topped white flower clusters called umbels in mid to late summer. <em>Sium suave</em> can reach heights of one to two meters and is often found in dense stands along slow-moving waterways. Despite its common name suggesting edibility, the plant contains toxic alkaloids and should not be consumed. The roots are particularly toxic and have been historically confused with edible water parsnip, posing a risk to foragers. Biological traits including average lifespan, stem height details, and mass remain poorly documented in standardized databases. Ecologically, common water parsnip provides nesting and foraging cover for wetland birds and mammals, and its umbel flowers attract a diversity of pollinators. The plant plays a structural role in freshwater riparian plant communities across its broad North American and Eurasian distribution.