Podiceps nigricollis vs eared grebe

Podiceps nigricollis and eared grebe both are nouns.

Word	Noun	Adjective	Verb	Adverb
Podiceps nigricollis	Yes	No	No	No
eared grebe	Yes	No	No	No

As nouns, Podiceps nigricollis and eared grebe are synonyms defined as:

Podiceps nigricollis and eared grebe: small grebe with yellow ear tufts and a black neck; found in Eurasia and southern Africa as well as western United States

Other synonyms of Podiceps nigricollis include black-necked grebe.

Podiceps nigricollis (noun)	eared grebe (noun)
small grebe with yellow ear tufts and a black neck; found in Eurasia and southern Africa as well as western United States	small grebe with yellow ear tufts and a black neck; found in Eurasia and southern Africa as well as western United States