Nut-Tree Pigmy vs Red-billed Duck

Stigmella microtheriella compared with Anas erythrorhyncha

Taxonomic Classification

Rank	Nut-Tree Pigmy	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	Nepticulidae	Anatidae
Genus	Stigmella	Anas
Species	Stigmella microtheriella	Anas erythrorhyncha

Evolutionary Relationship

Nut-Tree Pigmy and Red-billed Duck share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Nut-Tree Pigmy

LC — Least Concern

Red-billed Duck

LC — Least Concern

Physical Characteristics

Attribute	Nut-Tree Pigmy	Red-billed Duck
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Nut-Tree Pigmy

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, 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