I have personally witnessed…

I have personally witnessed the population of these birds explode on Lake Superior and many inland lakes. In the early 80's herring gull nesting islands became cormorant nesting islands then later as the island died they would be abandoned and the birds would move to another. They would number in the hundreds if not thousands and large rafts of them would sometimes be observed while boating in open lake areas. The food deposited on the nesting islands for young appeared to be perch. As the cormorant numbers increased, the perch population decreased. The Herring gull populations seemed to have decreased. Other birds with similar nesting habits seemed to have decreased. I am not a biologist, these are just personal observations.

I now see cormorants inhabiting numerous small inland lakes in all regions of Southern Ontario and during fishing trips into Northern Ontario I have observed small flocks of them in every area I visited.

Cormorants were a cursed species by most people within the area where the population appears to be abundant, if not excessive. A fatal control method similar to ones for crows, blackbirds, groundhogs, is necessary, so a person does not face a charge by authorities.