Redhead (Aythya americana) Science Article 4
abstract
Numerous investigators have shown experimentally that nasal or supraorbital salt glands exist in nonmarine waterfowl and have the ability to enlarge or atrophyi n responset o changesin the salt content of the drinking water (Scothome 1959, Ellis et al. 1963, Cooch 1964, Benson and Phillips 1964, Schmidt-Nielsen and Kim 1964
STEPHEN E. CORNELIUS, Auk, Vol. 99