Black-billed Cuckoo vs Cocos Cuckoo

Coccyzus erythropthalmus compared with Coccyzus ferrugineus

Key Differences

• Black-billed Cuckoo is Least Concern while Cocos Cuckoo is Vulnerable.

Taxonomic Classification

Rank	Black-billed Cuckoo	Cocos Cuckoo
Kingdom same	Animalia (동물)	Animalia (동물)
Phylum same	Chordata (척삭동물)	Chordata (척삭동물)
Class same	Aves (새)	Aves (새)
Order same	Cuculiformes (뻐꾸기목)	Cuculiformes (뻐꾸기목)
Family same	Cuculidae	Cuculidae
Genus same	Coccyzus	Coccyzus
Species	Coccyzus erythropthalmus	Coccyzus ferrugineus

Evolutionary Relationship

Black-billed Cuckoo and Cocos Cuckoo share a common ancestor at the Genus level: Coccyzus.

Conservation Status

Black-billed Cuckoo

LC — Least Concern

Cocos Cuckoo

VU — Vulnerable

Physical Characteristics

Attribute	Black-billed Cuckoo	Cocos Cuckoo
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Black-billed Cuckoo

Habitat

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

Range

Widely distributed across Europe (Denmark, Norway, Sweden), North America (United States), and South America (Colombia, Ecuador, Venezuela).

Cocos Cuckoo

Habitat

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

Range

Found in Norway. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Black-billed Cuckoo

검은부리뻐꾸기(Coccyzus erythropthalmus)는 IUCN 적색목록에서 최소관심종(LC)으로 분류됩니다. 서식 범위 전반에 걸쳐 널리 분포하고 개체수가 풍부하며, 개체군은 안정적으로 유지되고 있어 즉각적인 보전 우려는 없습니다.

Cocos Cuckoo

The Cocos Cuckoo (Coccyzus ferrugineus) is a medium-sized bird in the family Cuculidae, endemic to Cocos Island, a remote volcanic island in the eastern Pacific Ocean approximately 550 kilometres southwest of the Costa Rican coast. This island-restricted species is closely related to mainland cuckoos in the genus Coccyzus and represents a classic example of insular endemism. Adults display rufous-brown upperparts, a pale buffy underside, and a moderately long tail with white tail-tip spots on the dark outer feathers. The species inhabits the dense tropical forest that covers much of Cocos Island, foraging in the mid-canopy for caterpillars, insects, and small lizards. As with other cuckoos, Cocos Cuckoos are often cryptic and detected more readily by their calls than by direct observation. The species is classified as Vulnerable by the IUCN due to its severely restricted range on a single island of approximately 24 square kilometres, making any localised disturbance potentially significant. Threats include introduced mammals—particularly feral pigs and cats—that degrade forest structure and prey on nesting birds. Cocos Island is a protected national park and UNESCO World Heritage Site, offering some measure of safeguard, but continued monitoring of invasive species management is essential. Population estimates remain uncertain, but the bird appears to be a common resident within the island's forested interior.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway