quail vs wildfowl

quail and wildfowl both are nouns.

Word	Noun	Adjective	Verb	Adverb
quail	Yes	No	Yes	No
wildfowl	Yes	No	No	No

As nouns, wildfowl is a hypernym of quail; that is, wildfowl is a word with a broader meaning than quail:

quail: flesh of quail; suitable for roasting or broiling if young; otherwise must be braised
wildfowl: flesh of any of a number of wild game birds suitable for food

quail (noun)	wildfowl (noun)
small gallinaceous game birds	flesh of any of a number of wild game birds suitable for food
flesh of quail; suitable for roasting or broiling if young; otherwise must be braised

quail (verb)	wildfowl (verb)
draw back, as with fear or pain