Chestnut Short-tailed Bat vs Common Murre

Carollia castanea compared with Uria aalge

Key Differences

• Chestnut Short-tailed Bat is Least Concern while Common Murre is Critically Endangered.

Taxonomic Classification

Rank	Chestnut Short-tailed Bat	Common Murre
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Aves (Birds)
Order	Chiroptera (Bats)	Charadriiformes (Charadriiformes)
Family	Phyllostomidae	Alcidae
Genus	Carollia	Uria
Species	Carollia castanea	Uria aalge

Evolutionary Relationship

Chestnut Short-tailed Bat and Common Murre share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Chestnut Short-tailed Bat

LC — Least Concern

Common Murre

CR — Critically Endangered

Physical Characteristics

Attribute	Chestnut Short-tailed Bat	Common Murre
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Chestnut Short-tailed Bat

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Colombia, Ecuador, and Venezuela.

Common Murre

Habitat

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

Range

Distributed across Belgium, Denmark, Norway, Sweden, and United States. Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Chestnut Short-tailed Bat

The Chestnut Short-tailed Bat (Carollia castanea) is a species in the genus Carollia. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.

Common Murre

<em>Uria aalge</em>, the common murre or common guillemot, is a seabird in the family Alcidae found across the North Atlantic and North Pacific Oceans. This colonial cliff-nesting bird typically breeds on rocky coastal ledges and sea stacks, often in dense aggregations that may number in the thousands. <em>Uria aalge</em> is a highly capable diver, using its wings to propel itself underwater in pursuit of fish, sand eels, and invertebrates. It is found in coastal and offshore marine waters during the non-breeding season, ranging across the northern seas. Recorded occurrence countries include Belgium, Denmark, Norway, Sweden, and the United States. Despite its wide distribution and historically large numbers, the common murre is currently assessed as Critically Endangered in certain regional contexts, with populations threatened by oil spills, bycatch in fishing nets, food web disruptions linked to climate change, and disturbance at breeding colonies. Biological traits such as lifespan, body size, and diet remain poorly documented at the population level for this species across its full range, though it is known to be a piscivore. The species is a key indicator of marine ecosystem health and a focus of ongoing seabird conservation efforts.