Common Oak Pigmy vs White-Barred Alder Pigmy

Stigmella roborella compared with Stigmella glutinosae

Taxonomic Classification

Rank	Common Oak Pigmy	White-Barred Alder Pigmy
Kingdom same	Animalia (animal)	Animalia (animal)
Phylum same	Arthropoda (arthropodes)	Arthropoda (arthropodes)
Class same	Insecta (insecte)	Insecta (insecte)
Order same	Lepidoptera (Butterflies & Moths)	Lepidoptera (Butterflies & Moths)
Family same	Nepticulidae	Nepticulidae
Genus same	Stigmella	Stigmella
Species	Stigmella roborella	Stigmella glutinosae

Evolutionary Relationship

Common Oak Pigmy and White-Barred Alder Pigmy share a common ancestor at the Genus level: Stigmella.

Conservation Status

Common Oak Pigmy

LC — Least Concern

White-Barred Alder Pigmy

LC — Least Concern

Physical Characteristics

Attribute	Common Oak Pigmy	White-Barred Alder Pigmy
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Common Oak Pigmy

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

White-Barred Alder Pigmy

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

Common Oak Pigmy

<em>Stigmella roborella</em>, the common oak pigmy, is a minute leaf-mining moth in the family Nepticulidae, one of the smallest families of moths. The larvae of <em>Stigmella roborella</em> mine the leaves of oak trees (Quercus species), creating sinuous, narrow galleries within the leaf parenchyma that are characteristic of the genus. This species typically inhabits deciduous woodland, forest margins, parks, and hedgerows throughout temperate Europe wherever suitable oak host trees occur. Its geographic range includes Belgium, Denmark, Norway, and Sweden, reflecting a broad temperate European distribution. The species is currently assessed as Least Concern by the IUCN. Biological traits such as lifespan, body size, and diet remain poorly documented at a formal population level for this species, though larval leaf-mining on Quercus is well established in entomological literature. Adults are extremely small with narrow, metallic-patterned wings. <em>Stigmella roborella</em> contributes to the rich invertebrate biodiversity associated with European oak ecosystems and serves as an indicator of the ecological complexity supported by oak-dominated woodland habitats.

Shared Countries

Both species can be found in 4 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden