Borrer's Saltmarsh-Grass vs Cliff Mining Bee

Puccinellia fasciculata compared with Andrena thoracica

Key Differences

Borrer's Saltmarsh-Grass is Endangered while Cliff Mining Bee is Extinct.

Taxonomic Classification

Rank	Borrer's Saltmarsh-Grass	Cliff Mining Bee
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Magnoliophyta (Flowering Plants)	Arthropoda (Arthropods)
Class	Liliopsida (Monocots)	Insecta (Insects)
Order	Poales (Grasses)	Hymenoptera (Ants, Bees & Wasps)
Family	Poaceae (Grass Family)	Andrenidae
Genus	Puccinellia	Andrena
Species	Puccinellia fasciculata	Andrena thoracica

Conservation Status

Borrer's Saltmarsh-Grass

EN — Endangered

Cliff Mining Bee

EX — Extinct

Physical Characteristics

Attribute	Borrer's Saltmarsh-Grass	Cliff Mining Bee
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Borrer's Saltmarsh-Grass

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, montane grasslands and shrublands, and Mediterranean forests and woodlands, among 5 distinct biome types within the Afrotropic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Africa (South Africa), Europe (Belgium, Norway, Sweden), North America (Canada), and Oceania and the Pacific (Australia). Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Cliff Mining Bee

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Denmark, Luxembourg, Norway, and Sweden.

Borrer's Saltmarsh-Grass

The Borrer's Saltmarsh-grass (Puccinellia fasciculata) is a species in the genus Puccinellia. It is currently classified as Endangered on the IUCN Red List. Found across multiple habitat types including tropical and subtropical moist broadleaf forests, montane grasslands and shrublands, and Mediterranean forests and woodlands, among 5 distinct biome types within the Afrotropic biogeographic rea.

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.