Common filbert vs Eurasian red squirrel

Corylus avellana compared with Sciurus vulgaris

Taxonomic Classification

Rank	Common filbert	Eurasian red squirrel
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Magnoliophyta (Flowering Plants)	Chordata (Chordates)
Class	Magnoliopsida (Dicots)	Mammalia (Mammals)
Order	Fagales (Beeches & Oaks)	Rodentia (Rodents)
Family	Betulaceae	Sciuridae (Squirrels)
Genus	Corylus	Sciurus (Tree Squirrels)
Species	Corylus avellana	Sciurus vulgaris

Conservation Status

Common filbert

LC — Least Concern

Eurasian red squirrel

LC — Least Concern

Physical Characteristics

Attribute	Common filbert	Eurasian red squirrel
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Common filbert

Habitat

Inhabits Mediterranean forests and woodlands within the Palearctic biogeographic realm.

Range

Widely distributed across Asia (Cyprus, Iraq), Europe (7 countries), North America (Canada, United States), and South America (Brazil).

Eurasian red squirrel

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found across Asia (Georgia) and Europe (5 countries).

Common filbert

<em>Corylus avellana</em> is a deciduous shrub or small tree in the family Betulaceae, order Fagales, commonly known as the common hazel or common filbert. The species is classified as Least Concern on the IUCN Red List, with widespread and stable populations across its native and introduced range. <em>Corylus avellana</em> is native to Europe and western Asia and has been introduced to parts of North America and South America. It is particularly associated with temperate deciduous woodlands, hedgerows, and scrubland across the Mediterranean forests and the Palearctic realm. The species typically forms a multi-stemmed shrub with broad, rounded leaves and catkins that emerge in late winter before the leaves appear, representing one of the earliest flowering events of the temperate year. Hazel nuts produced by this species are an important food source for woodland wildlife including squirrels, dormice, and woodpeckers. The species has been cultivated for centuries for nut production and coppicing. Biological traits of this species remain poorly documented in the scientific literature.

Eurasian red squirrel

Eurasian red squirrel (Sciurus vulgaris) 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.