Caucasian Birch Mouse vs Cola-Nut Gall

Sicista caucasica compared with Andricus lignicolus

Key Differences

• Caucasian Birch Mouse is Near Threatened while Cola-Nut Gall is Not Evaluated.

Taxonomic Classification

Rank	Caucasian Birch Mouse	Cola-Nut Gall
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Arthropoda (Arthropods)
Class	Mammalia (Mammals)	Insecta (Insects)
Order	Rodentia (Rodents)	Hymenoptera (Ants, Bees & Wasps)
Family	Dipodidae	Cynipidae
Genus	Sicista	Andricus
Species	Sicista caucasica	Andricus lignicolus

Evolutionary Relationship

Caucasian Birch Mouse and Cola-Nut Gall share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Caucasian Birch Mouse

NT — Near Threatened

Cola-Nut Gall

NE — Not Evaluated

Physical Characteristics

Attribute	Caucasian Birch Mouse	Cola-Nut Gall
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Caucasian Birch Mouse

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Cola-Nut Gall

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Found across Europe (6 countries).

Caucasian Birch Mouse

The Caucasian Birch Mouse (Sicista caucasica) is a species in the genus Sicista. It is currently classified as Near Threatened on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.

Cola-Nut Gall

<em>Andricus lignicolus</em> is a gall wasp in the family Cynipidae. The name "Cola-Nut Gall" refers to the gall structure this species induces on oak trees, rather than a conventional common name for the organism itself. <em>Andricus lignicolus</em> has been recorded across parts of western and northern Europe, including Belgium, Denmark, France, Ireland, and the Netherlands. The species occupies a broad range of terrestrial and freshwater habitats within its range, reflecting the wide distribution of its host oak trees. Gall wasps in the genus <em>Andricus</em> have complex life cycles often involving alternating sexual and asexual generations, with different generations producing distinct gall morphologies on the same or different oak species. The species has not been assessed under the IUCN Red List. Diet data and specific biological measurements for <em>Andricus lignicolus</em> are not documented in available sources. Biological traits of this species remain poorly documented in the scientific literature. Its ecological role is tied to its host plants, and like other cynipid gall wasps, it likely hosts a variety of inquiline and parasitoid insects within its galls.