Bird's Eye vs Clustered Stonewort

Alectryon subcinereus compared with Tolypella glomerata

Key Differences

• Bird's Eye is Least Concern while Clustered Stonewort is Vulnerable.

Taxonomic Classification

Rank	Bird's Eye	Clustered Stonewort
Kingdom same	Plantae (Plants)	Plantae (Plants)
Phylum	Magnoliophyta (Flowering Plants)	Charophyta (Charophyta)
Class	Magnoliopsida (Dicots)	Charophyceae (Charophyceae)
Order	Sapindales (Sapindales)	Charales (Charales)
Family	Sapindaceae	Characeae
Genus	Alectryon	Tolypella
Species	Alectryon subcinereus	Tolypella glomerata

Evolutionary Relationship

Bird's Eye and Clustered Stonewort share a common ancestor at the Kingdom level: Plantae. (Plants)

Conservation Status

Bird's Eye

LC — Least Concern

Clustered Stonewort

VU — Vulnerable

Physical Characteristics

Attribute	Bird's Eye	Clustered Stonewort
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bird's Eye

Habitat

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

Clustered Stonewort

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Bird's Eye

The Bird's Eye (Alectryon subcinereus) is a species in the genus Alectryon. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Clustered Stonewort

Tolypella glomerata, the clustered stonewort, is a charophyte alga in the family Characeae, found in calcareous, nutrient-poor freshwater habitats including lakes, ponds, ditches, and slow-flowing water in northwestern and northern Europe. Charophytes are macroscopic green algae with a distinctive whorl-like arrangement of branches and a complex, plant-like structure that distinguishes them from other algae. T. glomerata is encrusted with calcium carbonate deposits (hence 'stonewort'), giving it a pale, grey-green appearance and rough texture. The species colonizes clear, low-nutrient water over fine sediment or gravel substrates where competition from vascular plants is reduced by nutrient limitation. It is listed as Vulnerable by the IUCN, reflecting significant declines driven by eutrophication (nutrient enrichment from agriculture and sewage), which promotes the growth of vascular plants and phytoplankton that shade out stoneworts. Drainage, water abstraction, and peat cutting also threaten its habitats. Charophyte diversity has declined substantially across lowland Europe and North America over the past century, with many species becoming locally extinct from sites they once colonized.