Common Water Rat vs European pine marten

Hydromys chrysogaster compared with Martes martes

Key Differences

• Common Water Rat is Least Concern while European pine marten is Critically Endangered.

Taxonomic Classification

Rank	Common Water Rat	European pine marten
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Chordata (脊索動物)	Chordata (脊索動物)
Class same	Mammalia (哺乳類)	Mammalia (哺乳類)
Order	Rodentia (ネズミ目)	Carnivora (ネコ目)
Family	Muridae (Mice & Rats)	Mustelidae (Weasels & Otters)
Genus	Hydromys	Martes
Species	Hydromys chrysogaster	Martes martes

Evolutionary Relationship

Common Water Rat and European pine marten share a common ancestor at the Class level: Mammalia. (哺乳類)

Conservation Status

Common Water Rat

LC — Least Concern

European pine marten

CR — Critically Endangered

Physical Characteristics

Attribute	Common Water Rat	European pine marten
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Common Water Rat

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

European pine marten

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and Mediterranean forests and woodlands within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Found across Europe (6 countries). Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Common Water Rat

<em>Hydromys chrysogaster</em>, commonly known as the common water rat or rakali, is a semi-aquatic rodent in the family Muridae, native to Australia and New Guinea. It is classified as Least Concern by the IUCN, reflecting its relatively stable population across a broad range of freshwater and estuarine habitats on the Australian continent and associated islands. The species typically inhabits the banks of rivers, lakes, wetlands, and estuaries, where it constructs burrows in streambanks. It is highly adapted for an aquatic lifestyle, with partially webbed hind feet, a flattened head, and a dense waterproof coat. <em>Hydromys chrysogaster</em> is a carnivore, typically feeding on fish, crustaceans, mussels, frogs, and aquatic invertebrates, which it often carries to elevated feeding platforms to consume. The species is nocturnal and crepuscular, most active during early morning and evening hours near the water's edge. Biological traits including average lifespan, body length, and weight remain poorly documented in standardized databases, though adults are generally robust for a rodent, reportedly reaching body lengths of 20–35 cm excluding the tail. Geographic range details for this particular record remain incompletely documented in available data sources. Ecologically, the common water rat is an important apex predator in small-scale freshwater food webs and serves as an indicator species for wetland health in Australian riparian systems.

European pine marten

ヨーロッパテン（Martes martes）はIUCNレッドリストで絶滅危惧IA類（CR）に分類されています。深刻な個体数減少と生息地の喪失により、野生での絶滅の極めて高いリスクに直面しています。