Common Silver Hairgrass vs ハイバラエメラルドハチドリ

Aira caryophyllea compared with Amazilia tzacatl

Key Differences

Common Silver Hairgrass is Endangered while ハイバラエメラルドハチドリ is Least Concern.

Taxonomic Classification

Rank	Common Silver Hairgrass	ハイバラエメラルドハチドリ
Kingdom	Plantae (植物)	Animalia (動物)
Phylum	Magnoliophyta (被子植物門)	Chordata (脊索動物)
Class	Liliopsida (単子葉植物綱)	Aves (鳥類)
Order	Poales (イネ目)	Apodiformes (アマツバメ目)
Family	Poaceae (Grass Family)	Trochilidae
Genus	Aira	Amazilia
Species	Aira caryophyllea	Amazilia tzacatl

Conservation Status

Common Silver Hairgrass

EN — Endangered

ハイバラエメラルドハチドリ

LC — Least Concern

Physical Characteristics

Attribute	Common Silver Hairgrass	ハイバラエメラルドハチドリ
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Common Silver Hairgrass

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical grasslands and savannas, and flooded grasslands and savannas, among 11 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Africa (Cameroon), Asia (Japan, South Korea), Europe (6 countries), North America (4 countries), Oceania and the Pacific (Australia), and South America (4 countries). Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

ハイバラエメラルドハチドリ

Habitat

Typically found in various aerial, terrestrial, and aquatic environments.

Range

Distributed across Colombia, Ecuador, Norway, and Venezuela.

Common Silver Hairgrass

<em>Aira caryophyllea</em>, commonly known as Common Silver Hairgrass, is a slender annual grass belonging to the family Poaceae within the order Poales. This delicate grass is currently classified as Endangered on the IUCN Red List, reflecting significant conservation concern despite its historically broad distribution. It is typically found across a remarkable diversity of biome types, including tropical and subtropical moist broadleaf forests, grasslands, savannas, and flooded habitats, demonstrating notable ecological versatility. Its geographic range spans multiple continents, with documented populations in Africa (Cameroon), Asia (Japan, South Korea), Europe, North America, Australia, and South America. As an annual grass, it completes its life cycle within a single growing season, reproducing via wind-dispersed seeds. The inflorescence typically bears silvery, shimmering spikelets that give the species its common name. Biological traits such as average lifespan, body dimensions, and dietary specifics follow typical patterns for annual grasses — drawing nutrients from soil through root absorption rather than consuming other organisms. The endangered status suggests populations may be declining due to habitat loss, land-use change, or invasive species pressure across parts of its range.

ハイバラエメラルドハチドリ

アカオハチドリ(Amazilia tzacatl)は中央アメリカと南アメリカ北西部で最もよく見られるハチドリの一つで、緑色の上面と診断的な明るい赤褐色の尾が特徴的な中型種である。メキシコからエクアドル、トリニダードにかけて、海抜0~2,100mの林縁、庭園、農園、二次林など多様な環境に生息する。給餌台や花の咲く植物の縄張りを積極的に守り、分布域全体の庭でしばしば目撃される。軽度懸念に指定されている。