Buttonhead Pipewort vs Common Seal

Eriocaulon heterolepis compared with Phoca vitulina

Key Differences

• Buttonhead Pipewort is Least Concern while Common Seal is Near Threatened.

Taxonomic Classification

Rank	Buttonhead Pipewort	Common Seal
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Magnoliophyta (Flowering Plants)	Chordata (Chordates)
Class	Liliopsida (Monocots)	Mammalia (Mammals)
Order	Poales (Grasses)	Pinnipedia (Seals & Sea Lions)
Family	Eriocaulaceae	Phocidae (True Seals)
Genus	Eriocaulon	Phoca (Harbor Seals)
Species	Eriocaulon heterolepis	Phoca vitulina

Conservation Status

Buttonhead Pipewort

LC — Least Concern

Common Seal

NT — Near Threatened

Population: ~500.0K

Trend: Stable →

Physical Characteristics

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

Habitat & Geographic Range

Buttonhead Pipewort

Habitat

Typically found in grasslands, wetlands, forests, and cultivated landscapes.

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.

Buttonhead Pipewort

The Buttonhead Pipewort (Eriocaulon heterolepis) is a species in the genus Eriocaulon. It is currently classified as Least Concern on the IUCN Red List. Typically found in grasslands, wetlands, forests, and cultivated landscapes.

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.