Alder vs Pear-tree Pigmy

Alnus glutinosa compared with Stigmella pyri

Key Differences

• Alder is Least Concern while Pear-tree Pigmy is Endangered.

Taxonomic Classification

Rank	Alder	Pear-tree Pigmy
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Magnoliophyta (Flowering Plants)	Arthropoda (Arthropods)
Class	Magnoliopsida (Dicots)	Insecta (Insects)
Order	Fagales (Beeches & Oaks)	Lepidoptera (Butterflies & Moths)
Family	Betulaceae	Nepticulidae
Genus	Alnus	Stigmella
Species	Alnus glutinosa	Stigmella pyri

Conservation Status

Alder

LC — Least Concern

Pear-tree Pigmy

EN — Endangered

Physical Characteristics

Attribute	Alder	Pear-tree Pigmy
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Alder

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

Widely distributed across Africa (South Africa), Asia (India, Japan), Europe (6 countries), North America (Canada, United States), Oceania and the Pacific (Australia, New Zealand), and South America (Chile).

Pear-tree Pigmy

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Found across Europe (6 countries). Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Alder

The Alder (Alnus glutinosa) is a species in the genus Alnus. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Shared Countries

Both species can be found in 3 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇸🇪 Sweden