Coiban Mastuff Bat vs Common Eider

Molossus coibensis compared with Somateria mollissima

Key Differences

Coiban Mastuff Bat is Least Concern while Common Eider is Near Threatened.

Taxonomic Classification

Rank	Coiban Mastuff Bat	Common Eider
Kingdom same	Animalia (동물)	Animalia (동물)
Phylum same	Chordata (척삭동물)	Chordata (척삭동물)
Class	Mammalia (포유류)	Aves (새)
Order	Chiroptera (박쥐)	Anseriformes (기러기목)
Family	Molossidae	Anatidae
Genus	Molossus	Somateria
Species	Molossus coibensis	Somateria mollissima

Evolutionary Relationship

Coiban Mastuff Bat and Common Eider share a common ancestor at the Phylum level: Chordata. (척삭동물)

보기 Phylum: Chordata

Conservation Status

Coiban Mastuff Bat

LC — Least Concern

Common Eider

NT — Near Threatened

Physical Characteristics

Attribute	Coiban Mastuff Bat	Common Eider
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Coiban Mastuff Bat

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Colombia, Ecuador, and Venezuela.

Common Eider

Habitat

Typically found in various aerial, terrestrial, and aquatic environments.

Range

Found across Europe (5 countries) and North America (United States). Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Coiban Mastuff Bat

The Coiban Mastuff Bat (Molossus coibensis) is a small free-tailed bat in the family Molossidae, named for Coiba Island off the Pacific coast of Panama, where specimens were first collected. Members of the genus Molossus are robust, fast-flying insectivores adapted to open-air foraging above the forest canopy and over water, characterised by narrow wings and a tail that extends beyond the patagium (wing membrane). Molossus coibensis inhabits lowland tropical forests and adjacent open habitats in Central America and northwestern South America, with confirmed records from Colombia, Ecuador, Venezuela, and Panama, indicating a distributional range that extends well beyond its type locality on Coiba Island. Like other mastiff bats, it roosts in crevices within buildings, rock faces, and hollow trees, emerging at dusk to pursue aerial insects at speed. The species feeds primarily on large beetles, moths, and other night-flying insects, typically hunted high above the forest. It is assessed as Least Concern by the IUCN based on its relatively wide range and tolerance of modified habitats. Molossus coibensis was long treated as a subspecies of Molossus molossus before being recognised as a distinct species based on morphological and molecular evidence. Ecological and life-history data specific to this taxon remain limited.