Bicknelldrossel vs Zwergdrossel

Catharus bicknelli compared with Catharus ustulatus

Key Differences

• Bicknelldrossel is Vulnerable while Zwergdrossel is Least Concern.

Taxonomic Classification

Rank	Bicknelldrossel	Zwergdrossel
Kingdom same	Animalia (Tier)	Animalia (Tier)
Phylum same	Chordata (Chordatiere)	Chordata (Chordatiere)
Class same	Aves (Vögel)	Aves (Vögel)
Order same	Passeriformes (Sperlingsvögel)	Passeriformes (Sperlingsvögel)
Family same	Turdidae	Turdidae
Genus same	Catharus	Catharus
Species	Catharus bicknelli	Catharus ustulatus

Evolutionary Relationship

Bicknelldrossel and Zwergdrossel share a common ancestor at the Genus level: Catharus.

Conservation Status

Bicknelldrossel

VU — Vulnerable

Zwergdrossel

LC — Least Concern

Physical Characteristics

Attribute	Bicknelldrossel	Zwergdrossel
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bicknelldrossel

Habitat

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

Range

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

Zwergdrossel

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).

Bicknelldrossel

The Bicknell's Thrush (Catharus bicknelli) is a species in the genus Catharus. It is currently classified as Vulnerable on the IUCN Red List. Typically found in various aerial, terrestrial, and aquatic environments.

Zwergdrossel

Olive-Backed Thrush (Catharus ustulatus) is classified as Least Concern (LC) on the IUCN Red List. Widespread and abundant across its range, with stable populations and no immediate conservation concerns.

Shared Countries

Both species can be found in 2 countries:

🇳🇴 Norway 🇺🇸 United States