Brook Alder vs Formosan koa

Alnus maritima compared with Acacia confusa

Key Differences

• Brook Alder is Endangered while Formosan koa is Least Concern.

Taxonomic Classification

Rank	Brook Alder	Formosan koa
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum same	Magnoliophyta (Flowering Plants)	Magnoliophyta (Flowering Plants)
Class same	Magnoliopsida (Dicots)	Magnoliopsida (Dicots)
Order	Fagales (Beeches & Oaks)	Fabales (Legumes & Allies)
Family	Betulaceae	Fabaceae
Genus	Alnus	Acacia
Species	Alnus maritima	Acacia confusa

Evolutionary Relationship

Brook Alder and Formosan koa share a common ancestor at the Class level: Magnoliopsida. (Dicots)

Conservation Status

Brook Alder

EN — Endangered

Formosan koa

LC — Least Concern

Physical Characteristics

Attribute	Brook Alder	Formosan koa
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Brook Alder

Habitat

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

Range

Distributed across Belgium, France, Netherlands, and United Kingdom. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Formosan koa

Habitat

Inhabits tropical and subtropical moist broadleaf forests spanning the Indomalayan and Oceanian realms. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Africa (Mauritius, Seychelles), Asia (5 countries), North America (United States), and Oceania and the Pacific (Fiji, Micronesia, Palau).

Brook Alder

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