Cliff Mining Bee vs Clustered clover

Andrena thoracica compared with Trifolium glomeratum

Key Differences

Cliff Mining Bee is Extinct while Clustered clover is Not Evaluated.

Taxonomic Classification

Rank	Cliff Mining Bee	Clustered clover
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Arthropoda (Arthropods)	Magnoliophyta (Flowering Plants)
Class	Insecta (Insects)	Magnoliopsida (Dicots)
Order	Hymenoptera (Ants, Bees & Wasps)	Fabales (Legumes & Allies)
Family	Andrenidae	Fabaceae
Genus	Andrena	Trifolium
Species	Andrena thoracica	Trifolium glomeratum

Conservation Status

Cliff Mining Bee

EX — Extinct

Clustered clover

NE — Not Evaluated

Physical Characteristics

Attribute	Cliff Mining Bee	Clustered clover
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.

Clustered clover

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

Widely distributed across Africa (South Africa), Asia (Japan), Europe (10 countries), North America (Canada, United States), Oceania and the Pacific (Australia), and South America (Chile).

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.

Clustered clover

Trifolium glomeratum, the clustered clover, is an annual herb in the family Fabaceae native to the Mediterranean region, including southern Europe, North Africa, and southwestern Asia. Like other clovers, it has trifoliate leaves and produces small, globe-shaped flower heads composed of numerous tiny pink to purplish-pink pea-type flowers. The specific epithet glomeratum means 'clustered into a rounded mass,' referring to the tightly grouped flowerheads that remain sessile (stalkless) amid the upper leaves. The species grows in dry, disturbed ground, sandy fields, roadsides, grasslands, and coastal areas where soils are thin and nutrient-poor. T. glomeratum has been widely naturalized outside its native range, particularly in Australia, New Zealand, South Africa, and parts of North and South America, where it can become a common weed of agricultural margins and waste ground. Like all clovers, it fixes atmospheric nitrogen through root nodule bacteria, contributing to soil fertility. It has not been formally evaluated by the IUCN for conservation status. The species is palatable to livestock and may be grazed where abundant.