chestnut worm vs Scarlet Macaw

Lumbricus castaneus compared with Ara macao

Key Differences

• chestnut worm is Not Evaluated while Scarlet Macaw is Least Concern.

Taxonomic Classification

Rank	chestnut worm	Scarlet Macaw
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Annelida (Segmented Worms)	Chordata (Chordates)
Class	Clitellata (Clitellata)	Aves (Birds)
Order	Crassiclitellata (Crassiclitellata)	Psittaciformes (Parrots)
Family	Lumbricidae	Psittacidae (True Parrots)
Genus	Lumbricus	Ara (Macaws)
Species	Lumbricus castaneus	Ara macao

Evolutionary Relationship

chestnut worm and Scarlet Macaw share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

chestnut worm

NE — Not Evaluated

Scarlet Macaw

LC — Least Concern

Population: ~50.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	chestnut worm	Scarlet Macaw
Diet	—	Herbivore
Average Lifespan	—	50 years
Average Length	—	85 cm
Average Weight	—	1.0 kg

Habitat & Geographic Range

chestnut worm

Habitat

Native to Europe and North America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Belgium, Denmark, Norway, Sweden, and United States.

Scarlet Macaw

Habitat

Typically found in grasslands, forests, and vegetated habitats.

Range

Found across Europe (5 countries) and South America (Colombia, Ecuador, Venezuela). Population trends indicate a declining trajectory in parts of its range.

chestnut worm

The chestnut worm (Lumbricus castaneus) is a species in the genus Lumbricus. Native to Europe and North America, inhabiting ecosystems characteristic of the region.

Scarlet Macaw

One of the most brilliantly colored birds in the Americas, scarlet macaws display vivid red, yellow, and blue plumage with wingspans reaching 1 meter. Found in humid lowland forests from Mexico to Bolivia, they are highly intelligent, long-lived — up to 75 years — and form lifelong pair bonds. They travel long distances to clay licks where they consume mineral-rich soil to detoxify seeds. Listed as Least Concern but locally threatened by habitat loss and the pet trade.

Shared Countries

Both species can be found in 2 countries:

🇧🇪 Belgium 🇳🇴 Norway