common bottlenose dolphin vs Variable Bluet

Tursiops truncatus compared with Coenagrion pulchellum

Key Differences

• common bottlenose dolphin is Least Concern while Variable Bluet is Endangered.

Taxonomic Classification

Rank	common bottlenose dolphin	Variable Bluet
Kingdom same	Animalia (สัตว์)	Animalia (สัตว์)
Phylum	Chordata (สัตว์มีแกนสันหลัง)	Arthropoda (สัตว์ขาปล้อง)
Class	Mammalia (สัตว์เลี้ยงลูกด้วยน้ำนม)	Insecta (แมลง)
Order	Cetacea (Whales & Dolphins)	Odonata (Odonata)
Family	Delphinidae (Oceanic Dolphins)	Coenagrionidae
Genus	Tursiops (Bottlenose Dolphins)	Coenagrion
Species	Tursiops truncatus	Coenagrion pulchellum

Evolutionary Relationship

common bottlenose dolphin and Variable Bluet share a common ancestor at the Kingdom level: Animalia. (สัตว์)

Conservation Status

common bottlenose dolphin

LC — Least Concern

Population: ~600.0K

Trend: Stable →

Variable Bluet

EN — Endangered

Physical Characteristics

Attribute	common bottlenose dolphin	Variable Bluet
Diet	Carnivore	—
Average Lifespan	45 years	—
Average Length	3.0 m	—
Average Weight	300.0 kg	—

Habitat & Geographic Range

common bottlenose dolphin

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical grasslands and savannas, among 12 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Asia (Taiwan), Europe (6 countries), and South America (Colombia, Ecuador, Venezuela).

Variable Bluet

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

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

common bottlenose dolphin

The most studied and recognized dolphin species, bottlenose dolphins inhabit warm and temperate oceans worldwide, from coastal shallows to the open sea. Highly intelligent with large brains relative to body size, they demonstrate self-recognition, complex communication, and social learning. They live in fluid fission-fusion societies and cooperate to herd fish. A keystone indicator species for marine ecosystem health.

Variable Bluet

Variable Bluet (Coenagrion pulchellum) is classified as Endangered (EN) on the IUCN Red List. At high risk of extinction in the wild, with significant population decline and ongoing threats to survival.

Shared Countries

Both species can be found in 4 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden