Bigeye thresher vs Speer’s Collared Frog

Alopias pelagicus compared with Mannophryne speeri

Key Differences

• Bigeye thresher is Endangered while Speer’s Collared Frog is Critically Endangered.

Taxonomic Classification

Rank	Bigeye thresher	Speer’s Collared Frog
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Chondrichthyes (Cartilaginous Fish)	Amphibia (Amphibians)
Order	Lamniformes (Mackerel Sharks)	Anura (Frogs & Toads)
Family	Alopiidae	Aromobatidae
Genus	Alopias	Mannophryne
Species	Alopias pelagicus	Mannophryne speeri

Evolutionary Relationship

Bigeye thresher and Speer’s Collared Frog share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Bigeye thresher

EN — Endangered

Speer’s Collared Frog

CR — Critically Endangered

Physical Characteristics

Attribute	Bigeye thresher	Speer’s Collared Frog
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bigeye thresher

Habitat

Typically found in marine environments from coastal waters to deep ocean.

Range

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

Speer’s Collared Frog

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and flooded grasslands and savannas, among 5 distinct biome types within the Neotropic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

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

Bigeye thresher

The Bigeye thresher (Alopias pelagicus) is a species in the genus Alopias. It is currently classified as Endangered on the IUCN Red List. Typically found in marine environments from coastal waters to deep ocean.