Broad-leaf arrowhead vs Common Water Rat

Sagittaria platyphylla compared with Hydromys chrysogaster

Key Differences

• Broad-leaf arrowhead is Not Evaluated while Common Water Rat is Least Concern.

Taxonomic Classification

Rank	Broad-leaf arrowhead	Common Water Rat
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Magnoliophyta (Flowering Plants)	Chordata (Chordates)
Class	Liliopsida (Monocots)	Mammalia (Mammals)
Order	Alismatales (Alismatales)	Rodentia (Rodents)
Family	Alismataceae	Muridae (Mice & Rats)
Genus	Sagittaria	Hydromys
Species	Sagittaria platyphylla	Hydromys chrysogaster

Conservation Status

Broad-leaf arrowhead

NE — Not Evaluated

Common Water Rat

LC — Least Concern

Physical Characteristics

Attribute	Broad-leaf arrowhead	Common Water Rat
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Broad-leaf arrowhead

Habitat

Typically found in grasslands, wetlands, forests, and cultivated landscapes.

Range

Widely distributed across Africa (South Africa), Asia (Georgia, Japan), Europe (Italy, Ukraine), North America (United States), Oceania and the Pacific (Australia, New Zealand), and South America (Colombia).

Common Water Rat

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Broad-leaf arrowhead

The Broad-Leaf Arrowhead (Sagittaria platyphylla) is a species in the genus Sagittaria. Typically found in grasslands, wetlands, forests, and cultivated landscapes. It has been recorded Widely distributed across Africa (South Africa), Asia (Georgia, Japan), Europe (Italy, Ukraine), North America (United States), Oceania and the Pacific (Australia, New Zealand), and South America (Colombia)..

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.