It's a common theme from the past few years. More people are seeing more bald eagles, and that's not the only news in bird of prey populations. Bird Studies Canada is saying that this is because of the ban on DDT.
The nonprofit group is saying that in addition to bald eagles, peregrine falcons, red-shouldered hawks, and the Swainson's hawk are all either stabilizing or growing in numbers. The only bird that isn't is the sparrow hawk.
According to the Ottawa Citizen, there has also been a boom in turkey vulture population, which used to be absent from the Great Lakes area.
DDT used to cause the birds to lay eggs that did not have tough enough shells. The insecticide was banned in 1972. –Brian McClintock
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