Abstract
Two inexperienced flocks of hand-reared Magpie Geese (Anseranos semipalmata) alarmed at all models drawn over their heads, irrespective of the shape of the model. It is suggested that the specific alarm response to the White-breasted Sea Eagle (Haliaeetus leucogaster) exhibited by wild Magpie Geese is acquired by young geese, partly by habituation to familiar species and partly by the formation of an association between alarm in the flock and the characteristic shape and flight of the Sea Eagle, as distinct from those of other birds seen only occasionally.

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