Alder vs Brown Widow

Alnus glutinosa compared with Latrodectus geometricus

Key Differences

• Alder is Least Concern while Brown Widow is Not Evaluated.

Taxonomic Classification

Rank	Alder	Brown Widow
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Magnoliophyta (Flowering Plants)	Arthropoda (Arthropods)
Class	Magnoliopsida (Dicots)	Arachnida (Arachnids)
Order	Fagales (Beeches & Oaks)	Araneae (Araneae)
Family	Betulaceae	Theridiidae
Genus	Alnus	Latrodectus
Species	Alnus glutinosa	Latrodectus geometricus

Conservation Status

Alder

LC — Least Concern

Brown Widow

NE — Not Evaluated

Physical Characteristics

Attribute	Alder	Brown Widow
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).

Brown Widow

Habitat

Typically found in terrestrial habitats from forests to deserts.

Range

Widely distributed across Africa (South Africa), Asia (Japan), Europe (7 countries), North America (United States), and South America (Colombia, Ecuador, Peru).

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.

Brown Widow

The Brown Widow (Latrodectus geometricus) is a species in the genus Latrodectus. Typically found in terrestrial habitats from forests to deserts. Its geographic range includes widely distributed across africa (south africa), asia (japan), europe (7 countries), north america (united states), and south america (colombia, ecuador, peru).

Shared Countries

Both species can be found in 6 countries:

🇧🇪 Belgium 🇯🇵 Japan 🇳🇴 Norway 🇿🇦 South Africa 🇸🇪 Sweden 🇺🇸 United States