Black-headed Gull vs Harmless Serotine

Chroicocephalus ridibundus compared with Eptesicus innoxius

Key Differences

• Black-headed Gull is Vulnerable while Harmless Serotine is Near Threatened.

Taxonomic Classification

Rank	Black-headed Gull	Harmless Serotine
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Aves (Birds)	Mammalia (Mammals)
Order	Charadriiformes (Charadriiformes)	Chiroptera (Bats)
Family	Laridae	Vespertilionidae
Genus	Chroicocephalus	Eptesicus
Species	Chroicocephalus ridibundus	Eptesicus innoxius

Evolutionary Relationship

Black-headed Gull and Harmless Serotine share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Black-headed Gull

VU — Vulnerable

Harmless Serotine

NT — Near Threatened

Physical Characteristics

Attribute	Black-headed Gull	Harmless Serotine
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Black-headed Gull

Habitat

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

Range

Widely distributed across Asia (Taiwan), Europe (4 countries), North America (United States), and South America (Colombia, Venezuela). Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Harmless Serotine

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Ecuador. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Black-headed Gull

Black-headed Gull (Chroicocephalus ridibundus) is classified as Vulnerable (VU) on the IUCN Red List. Facing a high risk of endangerment in the wild, with declining populations and increasing habitat pressure.