Common heathgrass vs Scarlet Macaw

Danthonia decumbens compared with Ara macao

Key Differences

Common heathgrass is Near Threatened while Scarlet Macaw is Least Concern.

Taxonomic Classification

Rank	Common heathgrass	Scarlet Macaw
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Magnoliophyta (Flowering Plants)	Chordata (Chordates)
Class	Liliopsida (Monocots)	Aves (Birds)
Order	Poales (Grasses)	Psittaciformes (Parrots)
Family	Poaceae (Grass Family)	Psittacidae (True Parrots)
Genus	Danthonia	Ara (Macaws)
Species	Danthonia decumbens	Ara macao

Conservation Status

Common heathgrass

NT — Near Threatened

Scarlet Macaw

LC — Least Concern

Population: ~50.0K

Trend: Decreasing ↓

Physical Characteristics

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

Habitat & Geographic Range

Common heathgrass

Habitat

Typically found in grasslands, wetlands, forests, and cultivated landscapes.

Range

Widely distributed across Europe (7 countries), North America (Canada, United States), Oceania and the Pacific (Australia), and South America (Chile). Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

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.

Common heathgrass

The common heathgrass, <em>Danthonia decumbens</em>, is a grass species belonging to the family Poaceae. It is typically found in grasslands, wetlands, and forested habitats, with a distribution that includes Europe, North America, Oceania, and South America. <em>Danthonia decumbens</em> is a perennial grass characteristically associated with nutrient-poor, acidic soils, and is a frequent component of heathland, moorland, and dry grassland communities across its range. It is assessed as Near Threatened on the IUCN Red List, suggesting that degradation and loss of its specialized low-nutrient habitats may be contributing to population declines. The species typically forms small tufts and produces cleistogamous flowers that self-fertilize without opening, as well as normal open flowers. No dietary information has been provided for this species. Biological traits of this species remain poorly documented in the scientific literature.

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.