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Birds may indeed digest seeds under conditions of rest. It has been postulated that almost all current knowledge on mechanisms of internal seed dispersal has been obtained from experiments with resting animals. A study with the mallard Anas platyrhynchos (common wild duck), claimed to be quantitatively one of the most important seed dispersing animals in ...


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The forward thrusting movement so peculiar of pigeons and other fowl (Fig. 1) while walking is thought to be related to shifting the visual field. The less visible backward motion of the head is thought to be related to fixating the field of view (Dunlap & Mowler (1931). According to the meticulous observational study by Dunlap & Mowler (1931), ...



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