Interclavicular air sac pressures and vocalization in mallard ducks Anas platyrhynchos.
D000400:Air Sacs / Q000502:physiology*; D000818:Animals; D002404:Catheterization; D004372:Ducks / Q000502:physiology*; D005260:Female; D008297:Male; D011312:Pressure; D013997:Time Factors; D014828:Vocalization, Animal / Q000502:physiology