Cock's-head Bell vs Oso Polar

Zeiraphera isertana compared with Ursus maritimus

Key Differences

• Cock's-head Bell is Least Concern while Oso Polar is Vulnerable.

Taxonomic Classification

Rank	Cock's-head Bell	Oso Polar
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (artrópodos)	Chordata (cordados)
Class	Insecta (insecto)	Mammalia (mamíferos)
Order	Lepidoptera (Butterflies & Moths)	Carnivora (carnívoros)
Family	Tortricidae	Ursidae (Bears)
Genus	Zeiraphera	Ursus (Bears)
Species	Zeiraphera isertana	Ursus maritimus

Evolutionary Relationship

Cock's-head Bell and Oso Polar share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Cock's-head Bell

LC — Least Concern

Oso Polar

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Cock's-head Bell	Oso Polar
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

Cock's-head Bell

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

Oso Polar

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and boreal forests and taiga, among 4 distinct biome types within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

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

Cock's-head Bell

The cock's head bell moth (Zeiraphera isertana) is a small tortrix moth in the family Tortricidae, occurring across deciduous and mixed woodland habitats in northern and central Europe, including Belgium, Denmark, Norway, and Sweden, as well as Britain and much of temperate continental Europe. Adults have a wingspan of approximately 16–22 millimetres and display intricate grey, brown, and white patterning on the forewings that provides effective cryptic camouflage against tree bark and lichens. The species flies in a single generation from July to September, and adults are nocturnal, coming to light. Larvae feed on the foliage of a range of deciduous trees, with oak (Quercus), hazel (Corylus), and related broadleaf species among the recorded host plants; larvae spin and bind leaves together as feeding shelters in a manner typical of many tortricid moths. Pupation occurs in leaf litter or bark crevices. Zeiraphera isertana is classified as Least Concern by the IUCN, reflecting its wide distribution and association with a broad range of common host tree species in well-established broadleaf woodland across its European range. The species belongs to a large genus that includes some economically important pests of conifers and orchards, though Z. isertana itself is not considered a significant pest. It is regularly recorded in standard moth surveys across Scandinavia and central Europe.

Oso Polar

El mayor carnivoro terrestre de la Tierra, el oso polar puede superar los 700 kg y se encuentra en el hielo marino del Artico, desde Canada hasta Rusia. Es un mamifero marino altamente especializado que depende del hielo marino para cazar focas anilladas y barbadas. Excelente nadador capaz de cubrir grandes distancias en agua abierta. Clasificado como Vulnerable, sus poblaciones soportan una presion severa por la rapida perdida de hielo marino artico debida al cambio climatico.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway