Chalk Screw-moss vs Red-billed Duck

Tortula vahliana compared with Anas erythrorhyncha

Key Differences

• Chalk Screw-moss is Vulnerable while Red-billed Duck is Least Concern.

Taxonomic Classification

Rank	Chalk Screw-moss	Red-billed Duck
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Bryophyta	Chordata (Chordates)
Class	Bryopsida (Bryopsida)	Aves (Birds)
Order	Pottiales (Pottiales)	Anseriformes (Anseriformes)
Family	Pottiaceae	Anatidae
Genus	Tortula	Anas
Species	Tortula vahliana	Anas erythrorhyncha

Conservation Status

Chalk Screw-moss

VU — Vulnerable

Red-billed Duck

LC — Least Concern

Physical Characteristics

Attribute	Chalk Screw-moss	Red-billed Duck
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Chalk Screw-moss

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

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

Red-billed Duck

Habitat

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

Range

Found across Europe (6 countries) and South America (Ecuador).

Chalk Screw-moss

The Chalk Screw-moss (Tortula vahliana) is a species in the genus Tortula. It is currently classified as Vulnerable on the IUCN Red List. Native to Europe, inhabiting ecosystems characteristic of the region.

Red-billed Duck

Red-billed Duck (Anas erythrorhyncha) 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