Giant Otter vs Red-Throated Diver

Pteronura brasiliensis compared with Gavia stellata

Key Differences

• Giant Otter is Endangered while Red-Throated Diver is Near Threatened.

Taxonomic Classification

Rank	Giant Otter	Red-Throated Diver
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Aves (Birds)
Order	Carnivora (Carnivorans)	Gaviiformes (Gaviiformes)
Family	Mustelidae (Weasels & Otters)	Gaviidae
Genus	Pteronura	Gavia
Species	Pteronura brasiliensis	Gavia stellata

Evolutionary Relationship

Giant Otter and Red-Throated Diver share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Giant Otter

EN — Endangered

Red-Throated Diver

NT — Near Threatened

Physical Characteristics

Attribute	Giant Otter	Red-Throated Diver
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Giant Otter

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Colombia and Venezuela. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Red-Throated Diver

Habitat

Typically found in various aerial, terrestrial, and aquatic environments.

Range

Found across Europe (5 countries) and North America (United States). Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Red-Throated Diver

Red-Throated Diver (Gavia stellata) is classified as Near Threatened (NT) on the IUCN Red List. Close to qualifying as threatened, with populations that may become vulnerable without conservation action.