similar incident happen when Dutch elm disease threatened to kill elm trees common in most residential communities. To eliminate the beetles that carried the disease the trees were sprayed with DDT. The DDT stuck to the leaves and when they fell in the fall the earthworms ate the leaves and became carriers of the pesticide. Once the robins returned in the spring they ate the worms and became contaminated themselves. The robins were dying at a high rate and the females that lived couldn't reproduce due to thin eggshells.
             Researchers have also found that when the pesticide DDT gets into fish eggs it can turn genetically male fish into apparent females. These altered males are fertile and are able to lay eggs that produce young. "Sex changes in fish are fairly common (SN- 10/21/95, 266)," and "scientists have known that a type of DDT called o,p'-DDT weakly mimics the sex hormone estrogen and can cause sex changes in fish and other animals (SN: 7/15/95, 44)." This is the first time, however, that scientists have seen n
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