Common Water Rat vs Serotine

Hydromys chrysogaster compared with Eptesicus serotinus

Key Differences

• Common Water Rat is Least Concern while Serotine is Vulnerable.

Taxonomic Classification

Rank	Common Water Rat	Serotine
Kingdom same	Animalia (动物界)	Animalia (动物界)
Phylum same	Chordata (脊索动物门)	Chordata (脊索动物门)
Class same	Mammalia (哺乳動物)	Mammalia (哺乳動物)
Order	Rodentia (啮齿目)	Chiroptera (翼手目)
Family	Muridae (Mice & Rats)	Vespertilionidae
Genus	Hydromys	Eptesicus
Species	Hydromys chrysogaster	Eptesicus serotinus

Evolutionary Relationship

Common Water Rat and Serotine share a common ancestor at the Class level: Mammalia. (哺乳動物)

Conservation Status

Common Water Rat

LC — Least Concern

Serotine

VU — Vulnerable

Physical Characteristics

Attribute	Common Water Rat	Serotine
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Common Water Rat

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Serotine

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found across Europe (7 countries). Currently classified as Vulnerable 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.

Serotine

晚蝠(Eptesicus serotinus)在IUCN红色名录中被列为易危(VU)。在野外面临较高的灭绝风险，种群数量下降，栖息地压力持续增大。