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Gadwall: Female decrescendo lower, less descending than Mallard. • Male gives short, nasal, buzzy blip call as well as a whistle (slightly higher than Mallard) during courtship. Female quacks similar to Mallard but weaker and slightly buzzier.
Female decrescendo:
Female call:
Male call:
Credits:All text copyright Michael O'Brien. All sounds copyright Macaulay Library. Image copyright Brian E. Small.