kestrel vs Falco tinnunculus

kestrel and Falco tinnunculus both are nouns.

Word	Noun	Adjective	Verb	Adverb
kestrel	Yes	No	No	No
Falco tinnunculus	Yes	No	No	No

As nouns, kestrel and Falco tinnunculus are synonyms defined as:

kestrel and Falco tinnunculus: small Old World falcon that hovers in the air against a wind

kestrel (noun)	Falco tinnunculus (noun)
small Old World falcon that hovers in the air against a wind	small Old World falcon that hovers in the air against a wind
small North American falcon