Technical Comments

Decline of DDT Residues in Migratory Songbirds

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Science  29 Nov 1974:
Vol. 186, Issue 4166, pp. 841-842
DOI: 10.1126/science.186.4166.841

Abstract

Analyses of ten species of migratory songbirds killed when the birds flew into television towers in Florida showed a progressive decline in the concentration of DDT and its metabolites (DDD and DDE) in their fat depots for the period 1964 to 1973. This decline is apparently correlated with the decreased usage of DDT in the United States during the same time.