Stellar's sea eagle vs Haliaeetus pelagicus

Stellar's sea eagle and Haliaeetus pelagicus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Stellar's sea eagle	Yes	No	No	No
Haliaeetus pelagicus	Yes	No	No	No

As nouns, Stellar's sea eagle and Haliaeetus pelagicus are synonyms defined as:

Stellar's sea eagle and Haliaeetus pelagicus: found on coasts of the northwestern Pacific

Other synonyms of Stellar's sea eagle include Kamchatkan sea eagle.

Stellar's sea eagle (noun)	Haliaeetus pelagicus (noun)
found on coasts of the northwestern Pacific	found on coasts of the northwestern Pacific