Cliff Mining Bee vs Variable Abalone

Andrena thoracica compared with Haliotis varia

Key Differences

• Cliff Mining Bee is Extinct while Variable Abalone is Least Concern.

Taxonomic Classification

Rank	Cliff Mining Bee	Variable Abalone
Kingdom same	Animalia (สัตว์)	Animalia (สัตว์)
Phylum	Arthropoda (สัตว์ขาปล้อง)	Mollusca (มอลลัสกา)
Class	Insecta (แมลง)	Gastropoda (ชั้นแกสโทรโพดา)
Order	Hymenoptera (แตน)	Lepetellida (Lepetellida)
Family	Andrenidae	Haliotidae
Genus	Andrena	Haliotis
Species	Andrena thoracica	Haliotis varia

Evolutionary Relationship

Cliff Mining Bee and Variable Abalone share a common ancestor at the Kingdom level: Animalia. (สัตว์)

Conservation Status

Cliff Mining Bee

EX — Extinct

Variable Abalone

LC — Least Concern

Physical Characteristics

Attribute	Cliff Mining Bee	Variable Abalone
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Cliff Mining Bee

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Denmark, Luxembourg, Norway, and Sweden.

Variable Abalone

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and deserts and xeric shrublands within the Indomalayan biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Distributed across Sri Lanka and Taiwan.

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.