Alcedo atthis vs kingfisher

Alcedo atthis and kingfisher both are nouns.

Word	Noun	Adjective	Verb	Adverb
Alcedo atthis	Yes	No	No	No
kingfisher	Yes	No	No	No

As nouns, kingfisher is a hypernym of Alcedo atthis; that is, kingfisher is a word with a broader meaning than Alcedo atthis:

Alcedo atthis: small kingfisher with greenish-blue and orange plumage
kingfisher: nonpasserine large-headed bird with a short tail and long sharp bill; usually crested and bright-colored; feed mostly on fish

Alcedo atthis (noun)	kingfisher (noun)
small kingfisher with greenish-blue and orange plumage	nonpasserine large-headed bird with a short tail and long sharp bill; usually crested and bright-colored; feed mostly on fish