False Bruce Spanworm vs Red-billed Duck

Macaria loricaria compared with Anas erythrorhyncha

Key Differences

• False Bruce Spanworm is Near Threatened while Red-billed Duck is Least Concern.

Taxonomic Classification

Rank	False Bruce Spanworm	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	Geometridae	Anatidae
Genus	Macaria	Anas
Species	Macaria loricaria	Anas erythrorhyncha

Evolutionary Relationship

False Bruce Spanworm and Red-billed Duck share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

False Bruce Spanworm

NT — Near Threatened

Red-billed Duck

LC — Least Concern

Physical Characteristics

Attribute	False Bruce Spanworm	Red-billed Duck
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

False Bruce Spanworm

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Denmark, Norway, Sweden, and United States. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

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