Black-spotted Cuscus vs Common Red-legged Robberfly

Spilocuscus rufoniger compared with Dioctria rufipes

Key Differences

• Black-spotted Cuscus is Critically Endangered while Common Red-legged Robberfly is Least Concern.

Taxonomic Classification

Rank	Black-spotted Cuscus	Common Red-legged Robberfly
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Arthropoda (Arthropods)
Class	Mammalia (Mammals)	Insecta (Insects)
Order	Diprotodontia (Marsupials)	Diptera (Diptera)
Family	Phalangeridae	Asilidae
Genus	Spilocuscus	Dioctria
Species	Spilocuscus rufoniger	Dioctria rufipes

Evolutionary Relationship

Black-spotted Cuscus and Common Red-legged Robberfly share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Black-spotted Cuscus

CR — Critically Endangered

Common Red-legged Robberfly

LC — Least Concern

Physical Characteristics

Attribute	Black-spotted Cuscus	Common Red-legged Robberfly
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Black-spotted Cuscus

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Common Red-legged Robberfly

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

Black-spotted Cuscus

The Black-spotted Cuscus (Spilocuscus rufoniger) is a species in the genus Spilocuscus. It is currently classified as Critically Endangered on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.

Common Red-legged Robberfly

<em>Dioctria rufipes</em>, the common red-legged robberfly, is a predatory fly in the family Asilidae, order Diptera. It is distributed across northwestern Europe, with confirmed records from Belgium, Denmark, Norway, and Sweden, typically favoring woodland edges, hedgerows, and meadows with abundant vegetation. The species is assessed as Least Concern on the IUCN Red List, reflecting stable populations across its European range. Robberflies in the genus Dioctria are slender, elongated flies characterized by a distinctive long proboscis used to inject paralyzing saliva into prey. <em>Dioctria rufipes</em> typically hunts smaller flying insects, including midges, small flies, and other soft-bodied arthropods, ambushing prey from resting perches on vegetation and capturing it mid-flight. Adults are typically active from late spring to early autumn, coinciding with peak insect activity. The red or reddish-orange coloration of the hind femora is the diagnostic feature that gives this species its common name. Larvae develop in soil or decaying wood, where they are believed to be predatory on other invertebrate larvae. Biological traits such as precise lifespan, body measurements, and diet composition remain poorly documented in quantitative studies. The species is considered an important component of invertebrate predator guilds in European agricultural landscapes.