Common Bithynia vs héron cendré

Bithynia tentaculata compared with Ardea cinerea

Taxonomic Classification

Rank	Common Bithynia	héron cendré
Kingdom same	Animalia (animal)	Animalia (animal)
Phylum	Mollusca (mollusques)	Chordata (Chordates)
Class	Gastropoda (Gastropoda)	Aves (oiseau)
Order	Littorinimorpha (Littorinimorpha)	Pelecaniformes (Pelecaniformes)
Family	Bithyniidae	Ardeidae
Genus	Bithynia	Ardea
Species	Bithynia tentaculata	Ardea cinerea

Evolutionary Relationship

Common Bithynia and héron cendré share a common ancestor at the Kingdom level: Animalia. (animal)

Conservation Status

Common Bithynia

LC — Least Concern

héron cendré

LC — Least Concern

Trend: Stable →

Physical Characteristics

Attribute	Common Bithynia	héron cendré
Diet	—	Carnivore
Average Lifespan	—	15 years
Average Length	—	95 cm
Average Weight	—	1.5 kg

Habitat & Geographic Range

Common Bithynia

Habitat

Typically found in terrestrial and aquatic habitats including forests and freshwater.

Range

Distributed across Belgium, Denmark, Norway, Sweden, and United States.

héron cendré

Habitat

Typically found in diverse ecosystems where prey species are available.

Range

Found across Europe (6 countries).

Common Bithynia

The common bithynia (<em>Bithynia tentaculata</em>) is a freshwater gastropod snail belonging to the family Bithyniidae. It is classified as Least Concern on the IUCN Red List and has been recorded across terrestrial and aquatic habitats in Belgium, Denmark, Norway, Sweden, and the United States. <em>Bithynia tentaculata</em> typically inhabits slow-moving or still freshwater environments such as lakes, ponds, canals, and rivers, often on muddy or sandy substrates where organic material is abundant. The species has a distinctive operculum that seals the shell opening, providing protection against desiccation and predators. It typically feeds by grazing on algae, detritus, and biofilms on submerged surfaces. The common bithynia serves as an intermediate host for several trematode parasites, making it ecologically significant in freshwater food webs and parasite life cycles. Biological traits of this species remain poorly documented in the scientific literature.

héron cendré

A large, elegant wading bird reaching up to 1 meter in height, gray herons inhabit wetlands, rivers, lakes, and coastal areas across Europe, Asia, and Africa. Patient, solitary hunters, they stand motionless for long periods before striking fish, frogs, and small mammals with lightning-fast dagger bill strikes. They nest colonially in tall trees in rookeries called heronries, sometimes shared with other colonial waterbirds. Widely distributed and of Least Concern globally.

Shared Countries

Both species can be found in 4 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden