Double-crested Cormorants

Dead corm on beachAfter being nearly wiped out by human persecution and pesticide poisoning, the Double-crested cormorant has returned to the Great Lakes. Cormorants are a native Ontario water bird who have not yet recovered to historic population levels.

The return of cormorants is a good news environmental story that indicates reduced pesticide levels. As well, cormorants are the only major predator of several damaging invasive fish species. Sadly, special interest angling groups – who erroneously claim cormorants are responsible for depleting sport fish numbers, destroying shoreline ecosystems, disturbing other colonial water birds and causing pollution – are pushing for their eradication.

As part of Cormorant Defenders International, Zoocheck is actively campaigning to rehabilitate the image of Double-crested cormorants, to stop abusive, unnecessary “population management” practices and to prevent their indiscriminate slaughter throughout Ontario.

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About Cormorant Defenders International

Cormorant Facts

The Issues

What You Can Do To Help Cormorants

Further Reading (Books, Articles, Reports)

Cormorants in the News



Watch this two part video for a better understanding of the plight and persistent myths surrounding this unfortunately persecuted waterbird.