Four-Lined Silverfish vs Red-billed Duck

Ctenolepisma lineata compared with Anas erythrorhyncha

Key Differences

• Four-Lined Silverfish is Not Evaluated while Red-billed Duck is Least Concern.

Taxonomic Classification

Rank	Four-Lined Silverfish	Red-billed Duck
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (Arthropods)	Chordata (Chordates)
Class	Insecta (Insects)	Aves (Birds)
Order	Zygentoma (Zygentoma)	Anseriformes (Anseriformes)
Family	Lepismatidae	Anatidae
Genus	Ctenolepisma	Anas
Species	Ctenolepisma lineata	Anas erythrorhyncha

Evolutionary Relationship

Four-Lined Silverfish and Red-billed Duck share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Four-Lined Silverfish

NE — Not Evaluated

Red-billed Duck

LC — Least Concern

Physical Characteristics

Attribute	Four-Lined Silverfish	Red-billed Duck
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Four-Lined Silverfish

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Norway, Portugal, Sweden, and United States.

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 2 countries:

🇧🇪 Belgium 🇳🇴 Norway