1. 1. Wax esters of eight more Anseriformes have been shown to contain simple mixtures of the following series of acids: dimethyl-hexanoic (A) and -heptanoic (B); trimethyl-octanoic (C) and -nonanoic (D); tetramethyl-decanoic (E) and -undecanoic (F); pentamethyl-dodecanoic (G) and -tridecanoic (H). E, F, G and H were obtained from the grass whistling duck, and mass spectra of G and H indicated that the methyl substituents were at positions 2, 4, 6, 8 and 10. 2. 2. Other Anatidae investigated were: Hawaiian goose (C, D, E), European wigeon (A, B), Chiloé wigeon (A, B, C), redhead and harlequin duck (B, C, D, E), smew (C, D). The major alcohol in each species was octadecanol. 3. 3. The crested screamer (family Anhimidae) had only n-acids, mainly C12and C14, and mainly n-C14, C15and C16alcohols. The resemblance of these wax esters to those of the magpie goose is striking. © 1976.
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