Common Water Rat vs

Hydromys chrysogaster compared with Nitzschia angularis

Key Differences

• Common Water Rat is Least Concern while is Not Evaluated.

Taxonomic Classification

Rank	Common Water Rat
Kingdom	Animalia (动物界)	Chromista (色藻界)
Phylum	Chordata (脊索动物门)	Ochrophyta (淡色藻门)
Class	Mammalia (哺乳動物)	Bacillariophyceae (硅藻纲)
Order	Rodentia (啮齿目)	Bacillariales (硅藻目)
Family	Muridae (Mice & Rats)	Bacillariaceae
Genus	Hydromys	Nitzschia
Species	Hydromys chrysogaster	Nitzschia angularis

Conservation Status

Common Water Rat

LC — Least Concern

NE — Not Evaluated

Physical Characteristics

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

Habitat & Geographic Range

Common Water Rat

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Habitat

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

Range

Distributed across Brazil, Norway, Sweden, and Taiwan.

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.

Nitzschia angularis是一种具有角状两端和沿硅壳龙骨位置明显缝合线的细长羽纹淡水硅藻。栖息于包括河流、池塘和富营养湖泊在内的富营养至中营养淡水环境中。这种光合硅藻与中等富营养淡水条件相关。