black slug vs Cliff Mining Bee

Milax nigricans compared with Andrena thoracica

Key Differences

• black slug is Not Evaluated while Cliff Mining Bee is Extinct.

Taxonomic Classification

Rank	black slug	Cliff Mining Bee
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Mollusca (Mollusks)	Arthropoda (Arthropods)
Class	Gastropoda (Gastropoda)	Insecta (Insects)
Order	Stylommatophora (Stylommatophora)	Hymenoptera (Ants, Bees & Wasps)
Family	Milacidae	Andrenidae
Genus	Milax	Andrena
Species	Milax nigricans	Andrena thoracica

Evolutionary Relationship

black slug and Cliff Mining Bee share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

black slug

NE — Not Evaluated

Cliff Mining Bee

EX — Extinct

Physical Characteristics

Attribute	black slug	Cliff Mining Bee
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

black slug

Habitat

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

Range

Found across Europe (8 countries).

Cliff Mining Bee

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Denmark, Luxembourg, Norway, and Sweden.

black slug

The Black slug (Milax nigricans) is a species in the genus Milax. Typically found in terrestrial and aquatic habitats including forests and freshwater.

Cliff Mining Bee

The Cliff Mining Bee, Andrena species in the family Andrenidae, is a solitary ground-nesting bee that excavates tunnels in cliff faces, earthen banks, and compacted sandy or loamy soils, where the loose or friable substrates exposed in cliff profiles provide ideal nesting conditions. Mining bees in the genus Andrena are among the most species-rich solitary bee genera in the world, with hundreds of species across the Holarctic region, many narrowly specialized in their choice of pollen host plants. Female cliff mining bees construct vertical or angled burrows in cliff faces, with lateral cells off the main shaft, each containing a pollen ball and a single egg. Males are typically smaller and emerge before females to establish territories near nesting sites. Many Andrena species are oligolectic, collecting pollen from only a small number of plant species, making their populations sensitive to the availability of specific flowering plants in the landscape surrounding nesting areas. Cliff and bank nesting habitats provide well-drained, sun-warmed substrates essential for brood development. The loss of natural cliff faces and earthen banks to development, vegetation succession, and quarrying reduces available nesting habitat for cliff mining bees.