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avian botulism during late autumn and early spring in saskatchewan.two outbreaks of botulism in central saskatchewan in which mortality of waterfowl continued into late autumn and then recurred in the same marshes the following spring are described. small numbers of birds were involved in each instance. dabbling ducks (predominantly mallards, anas platyrhynchos and pintails, anas acuta) and american coots, fulica americana were affected most commonly in autumn, whereas only diving ducks (predominantly lesser scaup, aythya affinis) were found to be involved in s ...19836887447
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