a plump of birds Subjectbird (birds)CategoryAnimals → BirdsConfidencehighAttestationwiktionary-attested 2 sourcesWiktionary - plumpWiktionary - Appendix:English collective nouns
a plump of ducks Subjectduck (ducks)CategoryAnimals → BirdsConfidencehighAttestationwiktionary-attested 2 sourcesWiktionary - plumpWiktionary - Appendix:English collective nouns
a plump of geese Context-dependent Subjectgoose (geese)CategoryAnimals → BirdsContexton landConfidencehighAttestationwikipedia-cited, wiktionary-attested 4 sourcesWikipedia - List of animal namesOxford University Press - AskOxford: GWiktionary - plumpWiktionary - Appendix:English collective nouns