Common Water Rat vs pardal-de-java

Hydromys chrysogaster compared with Lonchura oryzivora

Key Differences

• Common Water Rat is Least Concern while pardal-de-java is Vulnerable.

Taxonomic Classification

Rank	Common Water Rat	pardal-de-java
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (cordados)	Chordata (cordados)
Class	Mammalia (mamíferos)	Aves (ave)
Order	Rodentia (Roedores)	Passeriformes (Songbirds)
Family	Muridae (Mice & Rats)	Estrildidae
Genus	Hydromys	Lonchura
Species	Hydromys chrysogaster	Lonchura oryzivora

Evolutionary Relationship

Common Water Rat and pardal-de-java share a common ancestor at the Phylum level: Chordata. (cordados)

Conservation Status

Common Water Rat

LC — Least Concern

pardal-de-java

VU — Vulnerable

Physical Characteristics

Attribute	Common Water Rat	pardal-de-java
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Common Water Rat

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

pardal-de-java

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical grasslands and savannas, and flooded grasslands and savannas, among 6 distinct biome types spanning the Afrotropic and Indomalayan realms. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Africa (Tanzania), Asia (Taiwan, Thailand, Vietnam), Europe (5 countries), North America (United States), Oceania and the Pacific (Australia), and South America (Colombia, Venezuela). 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.

pardal-de-java

Um dos pássaros de gaiola mais populares no Leste Asiático, os pardais-de-java são tentilhões vistosos com plumagem cinza, cabeça preta marcante, manchas brancas características nas bochechas e bico vermelho brilhante. Nativos de Java e Bali, na Indonésia, foram introduzidos em muitas partes da Ásia, África e Américas. Habitam pastagens abertas, arrozais e terras agrícolas, frequentemente tornando-se pragas para as lavouras de arroz. Classificados como Vulneráveis em sua área de distribuição nativa devido à intensa pressão de captura para o comércio de pássaros em gaiola.