Black-eared flying fox vs Common Nut Truffle

Pteropus melanotus compared with Hymenogaster vulgaris

Key Differences

• Black-eared flying fox is Vulnerable while Common Nut Truffle is Data Deficient.

Taxonomic Classification

Rank	Black-eared flying fox	Common Nut Truffle
Kingdom	Animalia (Animals)	Fungi (Fungi)
Phylum	Chordata (Chordates)	Basidiomycota (Club Fungi)
Class	Mammalia (Mammals)	Agaricomycetes (Mushrooms)
Order	Chiroptera (Bats)	Agaricales (Gilled Mushrooms)
Family	Pteropodidae (Fruit Bats)	Hymenogastraceae
Genus	Pteropus (Flying Foxes)	Hymenogaster
Species	Pteropus melanotus	Hymenogaster vulgaris

Conservation Status

Black-eared flying fox

VU — Vulnerable

Common Nut Truffle

DD — Data Deficient

Physical Characteristics

Attribute	Black-eared flying fox	Common Nut Truffle
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Black-eared flying fox

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Common Nut Truffle

Habitat

Typically found in forest floors, decomposing wood, and soil ecosystems.

Range

Distributed across Denmark, Norway, Portugal, Sweden, and United States.

Black-eared flying fox

The Black-eared flying fox (Pteropus melanotus) is a species in the genus Pteropus. It is currently classified as Vulnerable on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.

Common Nut Truffle

<em>Hymenogaster vulgaris</em>, the common nut truffle, is a hypogeous (below-ground) fungus in the family Hymenogastraceae, order Agaricales. This sequestrate species produces enclosed, truffle-like fruiting bodies that mature underground and rely primarily on small mammals and invertebrates for spore dispersal, as the sporocarps never open to release spores aerially. <em>Hymenogaster vulgaris</em> typically forms ectomycorrhizal associations with hardwood tree species, particularly oaks and beeches, in temperate European forests. Its geographic range includes Denmark, Norway, Portugal, Sweden, and the United States, reflecting a somewhat scattered distribution across temperate zones. The species is currently assessed as Data Deficient by the IUCN, indicating that insufficient information exists to evaluate its conservation status, likely because hypogeous fungi are difficult to survey and their population trends are poorly known. Biological traits such as lifespan, body size, and diet remain poorly documented for this species. As an ectomycorrhizal fungus, <em>Hymenogaster vulgaris</em> plays a critical role in facilitating nutrient uptake in host trees and supporting forest health across its temperate range.