Black-Veined White vs Common Silver Hairgrass

Aporia crataegi compared with Aira caryophyllea

Taxonomic Classification

Rank	Black-Veined White	Common Silver Hairgrass
Kingdom	Animalia (动物界)	Plantae (植物)
Phylum	Arthropoda (节肢动物门)	Magnoliophyta (木兰植物门)
Class	Insecta (昆蟲綱)	Liliopsida (百合纲)
Order	Lepidoptera (鱗翅目)	Poales (禾本目)
Family	Pieridae	Poaceae (Grass Family)
Genus	Aporia	Aira
Species	Aporia crataegi	Aira caryophyllea

Conservation Status

Black-Veined White

EN — Endangered

Common Silver Hairgrass

EN — Endangered

Physical Characteristics

Attribute	Black-Veined White	Common Silver Hairgrass
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Black-Veined White

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and boreal forests and taiga, among 9 distinct biome types within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Found across Asia (Cyprus) and Europe (39 countries). Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its 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.

Black-Veined White

Black-Veined White（Aporia crataegi）在IUCN红色名录中被列为濒危（EN）物种。在野外面临高度灭绝风险，种群数量显著下降，生存威胁持续存在。

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.