Vocalizations of the Mallard (anas Platyrhynchos)
نویسنده
چکیده
Weidmann 1956; Johnsgard 1965; McKinney compartment was then placed into a 90 ft x 90 ft x 12 ft flight pen. Thus, each of the two observation 1965a, 1969, 1970), and quantitative data are pens had a group of four pairs that had been visually available for visual displays of a few species separated for 5 months. of ducks (e.g., Weidmann 1958; Weidmann Birds were individually marked with colored nasal and Daily 1971; S immons and Weidmann discs similar to those described by Bartonek and Dane
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Malignant Melanoma in a Female Mallard Duck (Anas platyrhynchos)
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