Common Brassy Ringlet vs Javan Rusa

Erebia cassioides compared with Rusa timorensis

Key Differences

• Common Brassy Ringlet is Least Concern while Javan Rusa is Vulnerable.

Taxonomic Classification

Rank	Common Brassy Ringlet	Javan Rusa
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (Arthropods)	Chordata (Chordates)
Class	Insecta (Insects)	Mammalia (Mammals)
Order	Lepidoptera (Butterflies & Moths)	Artiodactyla (Even-toed Ungulates)
Family	Nymphalidae (Brush-footed Butterflies)	Cervidae (Deer)
Genus	Erebia	Rusa
Species	Erebia cassioides	Rusa timorensis

Evolutionary Relationship

Common Brassy Ringlet and Javan Rusa share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Common Brassy Ringlet

LC — Least Concern

Javan Rusa

VU — Vulnerable

Physical Characteristics

Attribute	Common Brassy Ringlet	Javan Rusa
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Common Brassy Ringlet

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Austria, Bosnia and Herzegovina, Bulgaria, and Italy.

Javan Rusa

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, tundra, and tropical and subtropical moist broadleaf forests spanning the Australasia and Afrotropic and Oceanian realms.

Range

Distributed across Mauritius, New Zealand, and Norway. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Common Brassy Ringlet

The common brassy ringlet (<em>Erebia cassioides</em>) is a butterfly species endemic to high-altitude mountain environments of central and southern Europe, with documented occurrences in Austria, Bosnia and Herzegovina, Bulgaria, and Italy. This species typically inhabits all terrestrial and freshwater environments within its alpine range, favoring subalpine and alpine grasslands at elevations often exceeding 1,500 meters. It is classified as Least Concern on the IUCN Red List, reflecting a currently stable population status. As a member of the family Nymphalidae, the common brassy ringlet often feeds on grasses and sedges during its larval stage, while adult butterflies are typically found nectaring on alpine flowers. The species is often associated with calcareous grasslands and rocky slopes, where it can be seen flying in warm, sunny conditions during the summer months. Biological traits of this species remain poorly documented in the scientific literature.