brittlestar vs Ruddy Shelduck

Amphiura filiformis compared with Tadorna ferruginea

Key Differences

• brittlestar is Least Concern while Ruddy Shelduck is Not Evaluated.

Taxonomic Classification

Rank	brittlestar	Ruddy Shelduck
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Echinodermata (Echinoderms)	Chordata (Chordates)
Class	Ophiuroidea (Ophiuroidea)	Aves (Birds)
Order	Amphilepidida (Amphilepidida)	Anseriformes (Anseriformes)
Family	Amphiuridae	Anatidae
Genus	Amphiura	Tadorna
Species	Amphiura filiformis	Tadorna ferruginea

Evolutionary Relationship

brittlestar and Ruddy Shelduck share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

brittlestar

LC — Least Concern

Ruddy Shelduck

NE — Not Evaluated

Physical Characteristics

Attribute	brittlestar	Ruddy Shelduck
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

brittlestar

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

Ruddy Shelduck

Habitat

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

Range

Widely distributed across Asia (Israel, Taiwan), Europe (19 countries), and North America (United States).

brittlestar

The Brittlestar (Amphiura filiformis) is a species in the genus Amphiura. It is currently classified as Least Concern on the IUCN Red List. Native to Europe, inhabiting ecosystems characteristic of the region.

Ruddy Shelduck

Ruddy Shelduck (Tadorna ferruginea) is classified as Not Evaluated (NE) on the IUCN Red List. Not yet evaluated against IUCN Red List criteria. Conservation status remains to be determined.

Shared Countries

Both species can be found in 3 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden