Alpine Sulphur-Tresses vs common hydra

Alectoria ochroleuca compared with Hydra vulgaris

Key Differences

Alpine Sulphur-Tresses is Least Concern while common hydra is Not Evaluated.

Taxonomic Classification

Rank	Alpine Sulphur-Tresses	common hydra
Kingdom	Fungi (Fungi)	Animalia (Animals)
Phylum	Ascomycota (Sac Fungi)	Cnidaria (Cnidarians)
Class	Lecanoromycetes (Lecanoromycetes)	Hydrozoa (Hydrozoa)
Order	Lecanorales (Lecanorales)	Anthoathecata (Anthoathecata)
Family	Parmeliaceae	Hydridae
Genus	Alectoria	Hydra
Species	Alectoria ochroleuca	Hydra vulgaris

Conservation Status

Alpine Sulphur-Tresses

LC — Least Concern

common hydra

NE — Not Evaluated

Physical Characteristics

Attribute	Alpine Sulphur-Tresses	common hydra
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Alpine Sulphur-Tresses

Habitat

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

Range

Distributed across Colombia, Norway, Sweden, and United States.

common hydra

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

Alpine Sulphur-Tresses

The Alpine Sulphur-Tresses (Alectoria ochroleuca) is a species in the genus Alectoria. It is currently classified as Least Concern on the IUCN Red List. Native to Europe and North America and South America, inhabiting ecosystems characteristic of the region. Distributed across Colombia, Norway, Sweden, and United States.

common hydra

<em>Hydra vulgaris</em>, commonly known as the common hydra, is a small freshwater cnidarian in the family Hydridae. Its conservation status has not been formally evaluated by the IUCN. The species is recorded from Denmark, Norway, and Sweden, with its native range understood to encompass Europe broadly. It typically inhabits slow-moving or still freshwater bodies such as ponds, lakes, and streams, where it attaches to aquatic vegetation or submerged substrates. The common hydra is notable for its remarkable regenerative capabilities and has been the subject of substantial biological research. Diet information for this species is not available in current records. Biological traits of this species remain poorly documented in the scientific literature.