boisduval scale vs Common Seal

Diaspis boisduvalii compared with Phoca vitulina

Key Differences

• boisduval scale is Not Evaluated while Common Seal is Near Threatened.

Taxonomic Classification

Rank	boisduval scale	Common Seal
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (Arthropods)	Chordata (Chordates)
Class	Insecta (Insects)	Mammalia (Mammals)
Order	Hemiptera (Hemiptera)	Pinnipedia (Seals & Sea Lions)
Family	Diaspididae	Phocidae (True Seals)
Genus	Diaspis	Phoca (Harbor Seals)
Species	Diaspis boisduvalii	Phoca vitulina

Evolutionary Relationship

boisduval scale and Common Seal share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

boisduval scale

NE — Not Evaluated

Common Seal

NT — Near Threatened

Population: ~500.0K

Trend: Stable →

Physical Characteristics

Attribute	boisduval scale	Common Seal
Diet	—	Carnivore
Average Lifespan	—	30 years
Average Length	—	1.7 m
Average Weight	—	80.0 kg

Habitat & Geographic Range

boisduval scale

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Widely distributed across Asia (Japan, Taiwan), Europe (15 countries), and North America (United States).

Common Seal

Habitat

Typically found in diverse ecosystems where prey species are available.

Range

Found across Europe (7 countries) and North America (United States). Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

boisduval scale

The boisduval scale (Diaspis boisduvalii) is a species in the genus Diaspis. Native to Belgium, Bulgaria, Denmark, France, Germany.

Common Seal

The most widely distributed pinniped, harbor seals inhabit temperate and subarctic coastal waters of both the North Atlantic and North Pacific. Adults reach up to 130 kg and spend roughly equal time at sea hunting fish, squid, and crustaceans and hauling out on beaches or rocks to rest. Their large, expressive eyes are adapted for underwater vision in low light. Harbor seals are a critical food source for orcas, sharks, and polar bears.

Shared Countries

Both species can be found in 5 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇵🇹 Portugal 🇸🇪 Sweden 🇺🇸 United States