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Glossary & References / Keywords List / Definitions:

Term to be defined Definition Synonyms & Keywords
Secondaries

Click image for "External Appearance of a Duck" Section

 - "the inner flight feathers of the wing"(B36)

- "[Secondary feather] The inner flight quills that insert on the forearm (ulna) of the wing."(B8 - waterfowl natural history associated terms)

(See External Appearance of a Typical Duck - Wings)
  • Secondary feather