A s A RESULTof an appeal in a paper by Ash (195 9), further specimens of polleniferous contaminants, some containing other substances, were removed from the heads of migrant birds in i960. The most notable contribution was made by P.H.J, in the Camargue, France. The general appearance of such contamination and its position on the bird has been described already (pp. cit.); there is little new to a...

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