Laysan Duck vs Sandwich Tern

Anas laysanensis compared with Thalasseus sandvicensis

Key Differences

• Laysan Duck is Critically Endangered while Sandwich Tern is Least Concern.

Taxonomic Classification

Rank	Laysan Duck	Sandwich Tern
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Aves (Birds)	Aves (Birds)
Order	Anseriformes (Anseriformes)	Charadriiformes (Charadriiformes)
Family	Anatidae	Laridae
Genus	Anas	Thalasseus
Species	Anas laysanensis	Thalasseus sandvicensis

Evolutionary Relationship

Laysan Duck and Sandwich Tern share a common ancestor at the Class level: Aves. (Birds)

Conservation Status

Laysan Duck

CR — Critically Endangered

Sandwich Tern

LC — Least Concern

Physical Characteristics

Attribute	Laysan Duck	Sandwich Tern
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Laysan Duck

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and Mediterranean forests and woodlands within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Distributed across Belgium, France, Netherlands, Norway, and United Kingdom. Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Sandwich Tern

Habitat

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

Range

Found across Europe (4 countries) and South America (Colombia, Ecuador, Venezuela).

Laysan Duck

Laysan Duck (Anas laysanensis) is classified as Critically Endangered (CR) on the IUCN Red List. Facing an extremely high risk of extinction in the wild due to severe population decline and habitat loss.

Sandwich Tern

Sandwich Tern (Thalasseus sandvicensis) is classified as Least Concern (LC) on the IUCN Red List. Widespread and abundant across its range, with stable populations and no immediate conservation concerns.

Shared Countries

Both species can be found in 2 countries:

🇧🇪 Belgium 🇳🇴 Norway