Green Silver-Spangled Shark vs Red-billed Duck

Cucullia argentea compared with Anas erythrorhyncha

Key Differences

• Green Silver-Spangled Shark is Critically Endangered while Red-billed Duck is Least Concern.

Taxonomic Classification

Rank	Green Silver-Spangled Shark	Red-billed Duck
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (Arthropods)	Chordata (Chordates)
Class	Insecta (Insects)	Aves (Birds)
Order	Lepidoptera (Butterflies & Moths)	Anseriformes (Anseriformes)
Family	Noctuidae	Anatidae
Genus	Cucullia	Anas
Species	Cucullia argentea	Anas erythrorhyncha

Evolutionary Relationship

Green Silver-Spangled Shark and Red-billed Duck share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Green Silver-Spangled Shark

CR — Critically Endangered

Red-billed Duck

LC — Least Concern

Physical Characteristics

Attribute	Green Silver-Spangled Shark	Red-billed Duck
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Green Silver-Spangled Shark

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and temperate grasslands and steppes within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Distributed across Denmark, Norway, Sweden, and Ukraine. Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Red-billed Duck

Habitat

Typically found in various aerial, terrestrial, and aquatic environments.

Range

Found across Europe (6 countries) and South America (Ecuador).

Red-billed Duck

Red-billed Duck (Anas erythrorhyncha) is classified as Least Concern (LC) on the IUCN Red List. Widespread and abundant across its range, with stable populations and no immediate conservation concerns.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway