Common Water Rat vs

Hydromys chrysogaster compared with Pyrenula nitida

Key Differences

• Common Water Rat is Least Concern while is Endangered.

Taxonomic Classification

Rank	Common Water Rat
Kingdom	Animalia (동물)	Fungi (균계)
Phylum	Chordata (척삭동물)	Ascomycota (자낭균류)
Class	Mammalia (포유류)	Eurotiomycetes (흰가시동충하초강)
Order	Rodentia (설치류)	Pyrenulales (Pyrenulales)
Family	Muridae (Mice & Rats)	Pyrenulaceae
Genus	Hydromys	Pyrenula
Species	Hydromys chrysogaster	Pyrenula nitida

Conservation Status

Common Water Rat

LC — Least Concern

EN — Endangered

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

Range

Distributed across Denmark, Norway, Portugal, Sweden, and United States. Currently classified as 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.

Pyrenula nitida는 서유럽 습한 대서양 삼림의 오래된 활엽수 매끄러운 수피에 매끄럽고 광택 있는 올리브 녹색에서 갈색 엽상체와 내포된 플라스크형 병각을 형성하는 수피생 각피 지의류이다. 서유럽에서 지속성 오래된 삼림의 대표 지표종으로 여겨진다. 고목 및 오래된 삼림 서식지의 손실로 심각하게 위협받는 멸종위기 지의류이다.