Greater Crested Tern vs Merriam’s Pocket Mouse

Thalasseus bergii compared with Perognathus merriami

Taxonomic Classification

Rank	Greater Crested Tern	Merriam’s Pocket Mouse
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Aves (Birds)	Mammalia (Mammals)
Order	Charadriiformes (Charadriiformes)	Rodentia (Rodents)
Family	Laridae	Heteromyidae
Genus	Thalasseus	Perognathus
Species	Thalasseus bergii	Perognathus merriami

Evolutionary Relationship

Greater Crested Tern and Merriam’s Pocket Mouse share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Greater Crested Tern

LC — Least Concern

Merriam’s Pocket Mouse

LC — Least Concern

Physical Characteristics

Attribute	Greater Crested Tern	Merriam’s Pocket Mouse
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Greater Crested Tern

Habitat

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

Range

Found in Norway.

Merriam’s Pocket Mouse

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.