swiftlet vs Collocalia inexpectata

swiftlet and Collocalia inexpectata both are nouns.

Word	Noun	Adjective	Verb	Adverb
swiftlet	Yes	No	No	No
Collocalia inexpectata	Yes	No	No	No

As nouns, swiftlet and Collocalia inexpectata are synonyms defined as:

swiftlet and Collocalia inexpectata: swift of eastern Asia; produces the edible bird's nest

swiftlet (noun)	Collocalia inexpectata (noun)
swift of eastern Asia; produces the edible bird's nest	swift of eastern Asia; produces the edible bird's nest