flat-backed millipede vs Gray/Purple Heron

Polydesmus complanatus compared with Ardea cinerea

Taxonomic Classification

Rank	flat-backed millipede	Gray/Purple Heron
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (Arthropods)	Chordata (Chordates)
Class	Diplopoda (Diplopoda)	Aves (Birds)
Order	Polydesmida (Polydesmida)	Pelecaniformes (Pelecaniformes)
Family	Polydesmidae	Ardeidae
Genus	Polydesmus	Ardea
Species	Polydesmus complanatus	Ardea cinerea

Evolutionary Relationship

flat-backed millipede and Gray/Purple Heron share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

flat-backed millipede

LC — Least Concern

Gray/Purple Heron

LC — Least Concern

Trend: Stable →

Physical Characteristics

Attribute	flat-backed millipede	Gray/Purple Heron
Diet	—	Carnivore
Average Lifespan	—	15 years
Average Length	—	95 cm
Average Weight	—	1.5 kg

Habitat & Geographic Range

flat-backed millipede

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

Gray/Purple Heron

Habitat

Typically found in diverse ecosystems where prey species are available.

Range

Found across Europe (6 countries).

Gray/Purple Heron

A large, elegant wading bird reaching up to 1 meter in height, gray herons inhabit wetlands, rivers, lakes, and coastal areas across Europe, Asia, and Africa. Patient, solitary hunters, they stand motionless for long periods before striking fish, frogs, and small mammals with lightning-fast dagger bill strikes. They nest colonially in tall trees in rookeries called heronries, sometimes shared with other colonial waterbirds. Widely distributed and of Least Concern globally.

Shared Countries

Both species can be found in 3 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden